MESON Chess Problem Database

Problem Display
PID: 71156 (8/6Q1/p2pP1N1/1pRPqpN1/1P1k4/1K4p1/2PBpn2/3R4 w - - 0 1)

Woodward, LA

Chess, 1951

8/6Q1/p2pP1N1/1pRPqpN1/1P1k4/1K4p1/2PBpn2/3R4

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Qxf6#
    • 1...Sd3
      • 2.c3#
    • 1...Se4
      • 2.Sf3#
    • 1...dxc5
      • 2.Qxe5#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Shf3#
        • 2.Sxf5#
      • 1...Qxg7
        • 2.Shf3#
      • 1...exd1Q
        • 2.Sxf5#
      • 1...exd1B
        • 2.Sxf5#
      • 1...Qf6
        • 2.Shf3#
        • 2.Qxf6#
      • 1...e1S
        • 2.Sxf5#
      • 1...f4
        • 2.Shf3#
        • 2.Sf5#
      • 1...dxc5!
    • 1.Se7?
      • threat
        • 2.Sxf5#
        • 2.Sc6#
      • 1...Qxg7
        • 2.Sc6#
      • 1...Qf6
        • 2.Sc6#
        • 2.Qxf6#
      • 1...f4
        • 2.Sf5#
        • 2.Sc6#
      • 1...dxc5!
    • 1.Rc4+?
      • 1...Kxd5
        • 2.Se7#
        • 2.Qb7#
      • 1...bxc4+!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Rxb5#
      • 1...Qe3+
        • 2.Bc3#
      • 1...Qxd5+
        • 2.Rc4#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Sd3
        • 2.c3#
      • 1...Se4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(f);OGATEB::QAB(K),XQ(f)
    • S(b);SBLOCK::P(B)
    • S(b);SBLOCK::S(H)
    • P(i);N_GUARD,XR(F)::QAB1(K),XQ(f)
  • Tries
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_SPINQ(f),XQ(K)::S(J)
        • P(a);P_PINP(B),XR(A)::S(J),XP(g)
        • P(a);::S(J),XP(g)
      • Refutation
        • P(i);XR(F)
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_SPINQ(f),XQ(K)::S(J)
      • Refutation
        • P(i);XR(F)
    • Try
      • R(F);CHECK
      • Refutation
        • P(e);CHECK,XR(F)
  • Actual
    • Q(K);N_PINQ(f)
    • Threat
      • QAB(K)+R(F),XP(e)
    • Vars
      • Q(f);CHECK,SBLOCK::R(A)+B(C),DCHECK
      • Q(f);CHECK,SBLOCK,XP(G)::QAB(K)+R(F),DCHECK
      • P(i);OGATE,P_SPINP(i),XR(F)::QAB1(K),XP(i)
      • Q(f);OGATEB::QAB(K),XQ(f)
      • S(b);SBLOCK::P(B)
      • S(b);SBLOCK::S(H)
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