Class 2 Problems - Check
Check constrains forward play to deal with the check, but also constrains retro play to put the check in place. Only a strong theme justifies the use of a check, since it prunes the tree of possible moves drastically.
8/1b1p4/3P4/B7/8/1R6/RQ5P/5k1K w - - id #011 (7+3+1?) Noam Elkies version by Andrew Buchanan. DR. What color is the pawn on a6?; (Version of Diag 5 from the tutorial,)
8/8/7Q/pBN1k3/rpK1rpP1/pBpPpR2/P1P1P3/3R4 w - - id #018 (12+9) DR. Last move? Which of the two bishops is original?;
8/8/8/p1R5/k7/1pp5/K1N5/NR6 w - - id #019 (5+4) DR. Last move?;
1NRBk3/NqKRP3/PPPPP3/8/8/8/8/8 w - - id #022 (12+2) DR. Last move?;
8/8/8/1p6/1P2p1p1/1P1pP1P1/B2PpBRB/kqK1B1BR w - - id #035 (13+7) DR. Last move?;
The following address the Max Unit challenge:
5nqn/3pNprb/p2PpPpr/BK2P1Pp/1pB4P/bPp5/PkP5/R2Q2NR w - - id #050 (16+16) Richard Stanley. DR. Legal?;
2bbqn2/1prkrp1p/1Pp1pPpP/p1PpP1P1/P2K4/1nRNB3/3P2BR/6QN w - - id #051 (16+16) DR. Last move?;
bqn1R1B1/prp1br2/PpPpk3/1P1n1p1N/5Pp1/4p1Pp/Q2PPK1P/4NRB1 w - - id #056 Richard Stanley. (16+16) DR. Legal?;
The following address the Gen n challenge:
rn1K4/kb3q2/pP6/b1Pp4/Pp1P4/8/8/8 w - - id #064 Richard Stanley. (5+9) DR. Legal?;
rrbK4/kp3q2/pb2p3/2Pp2p1/Pn1Pp1P1/4p1P1/4P1PB/5BRR w - - id #069 (12+14) Richard Stanley version by Noam Elkies. DR. Legal?;
1k6/qP6/1KPp4/RN1P4/8/8/8/8 w - - id #080 (6+3) DR. Last move?; |