MESON Chess Problem Database

Problem Display
PID: 143517 (8/1q1b1r2/1B6/3NRP2/P1k1P2Q/1prR1K2/Pb2P3/4N3 w - - 0 1)

Cook, CB

American Chess Problemist, 1949

8/1q1b1r2/1B6/3NRP2/P1k1P2Q/1prR1K2/Pb2P3/4N3

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.exd5#
    • 1...Rc1
      • 2.axb3#
    • 1...Rc2
      • 2.axb3#
    • 1...Rxd3+
      • 2.exd3#
    • 1...Rxf5+
      • 2.exf5#
    • 1...Bc1
      • 2.Rxc3#
    • 1...Ba3
      • 2.Rxc3#
    • 1...Bxf5
      • 2.exf5#
  • Keys
    • 1.a3!
      • threat
        • 2.Se3#
      • 1...Rxd3+
        • 2.exd3#
      • 1...Rxf5+
        • 2.exf5#
      • 1...Qxd5
        • 2.exd5#
      • 1...Qxb6
        • 2.Sxb6#
      • 1...Bxa3
        • 2.Rxc3#
      • 1...Bc1
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_PINP(K),OGATE,P_PINP(G),XS(I)::QAR(H)+P(G),XQ(e)
    • R(c);N_GUARD,N_PINR(D)::P(B),XP(b)
    • R(c);CHECK,OGATE,XR(D)::P(C),XR(c)
    • R(g);CHECK,OGATE,XP(K)::QAR(H)+P(G),XR(g)
    • B(a);N_GUARD::R1(D),XR(c)
    • B(f);OGATE,XP(K)::QAR(H)+P(G),XB(f)
  • Actual
    • P(B);
    • Threat
      • S(I)
    • Vars
      • R(c);CHECK,OGATE,XR(D)::P(C),XR(c)
      • R(g);CHECK,OGATE,XP(K)::QAR(H)+P(G),XR(g)
      • Q(e);N_PINP(K),OGATE,P_PINP(G),XS(I)::QAR(H)+P(G),XQ(e)
      • Q(e);XB(L)::S(I),XQ(e)
      • B(a);N_GUARD,XP(B)::R1(D),XR(c)
      • B(a);N_GUARD::R1(D),XR(c)
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