MESON Chess Problem Database

Problem Display
PID: 38475 (B3R2K/8/1pr4p/3rNP2/qN2kP1R/1b2B2Q/2p2P2/b7 w - - 0 1)

Howard, Kenneth Samuel

8th Comm., BCF 016. Ty., 1934-1935

B3R2K/8/1pr4p/3rNP2/qN2kP1R/1b2B2Q/2p2P2/b7

#2

11 + 9

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc4#
    • 1...Rxe5
      • 2.fxe5#
    • 1...Rc3
      • 2.Sd7#
    • 1...Rc4
      • 2.Bxd5#
    • 1...Bxe5+
      • 2.fxe5#
  • Tries
    • 1.Bc5?
      • threat
        • 2.f3#
      • 1...Bxe5+
        • 2.fxe5#
      • 1...Rdxc5
        • 2.Qd3#
      • 1...Rcxc5
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rd4
        • 2.Sc4#
      • 1...Bd4
        • 2.Qd3#
      • 1...bxc5!
    • 1.Rh5?
      • threat
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qf3#
      • 1...Rxe5
        • 2.Qg2#
        • 2.Qh1#
      • 1...c1Q
        • 2.Qg2#
        • 2.Qf3#
      • 1...c1R
        • 2.Qg2#
        • 2.Qf3#
      • 1...Rd1
        • 2.Qg2#
        • 2.Qf3#
      • 1...Rg6
        • 2.Qf3#
      • 1...Bxe5+!
  • Keys
    • 1.Bxb6!
      • threat
        • 2.f3#
      • 1...Bxe5+
        • 2.fxe5#
      • 1...Rxb6
        • 2.Qd3#
      • 1...Rdc5
        • 2.Qd3#
      • 1...Rcc5
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rd4
        • 2.Sc4#
      • 1...Rc3
        • 2.Sd7#
      • 1...Bd4
        • 2.Qd3#

Anticipated by 65065(1921)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(f);N_PINS(G),P_SPINR(h)::R(J)+S(G)
    • R(f);OGATE,P_SPINR(f),XS(G)::R(F)+P(E),XR(f)
    • R(h);N_PINS(G),P_SPINR(f)::R(J)+S(G)
    • R(h);OGATE,P_SPINR(f)::B(I),XR(f)
    • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::R(F)+P(E),XB(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • P(A)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::R(F)+P(E),XB(a)
        • R(f);N_GUARD,P_SPINR(h),XB(B)::QAB1(C)
        • R(h);P_SPINR(f),XB(B)::QAB1(C)
        • R(f);N_GUARD,P_SPINR(h)::QAB1(C),XR(f)
        • R(f);N_PINS(G),P_SPINR(h)::R(J)+S(G)
        • B(a);S_CUTR(f)::QAB1(C)
      • Refutation
        • P(g);XB(B)
    • Try
      • R(F);
      • Threat
        • DUALS(3)
      • Vars
        • R(h);P_SPINR(f)::QAB1(C)
      • Refutation
        • B(a);CHECK,P_SPINB(a),XS(G)
  • Actual
    • B(B);XP(g)
    • Threat
      • P(A)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::R(F)+P(E),XB(a)
      • R(h);P_SPINR(f),XB(B)::QAB1(C)
      • R(f);N_GUARD,P_SPINR(h)::QAB1(C)
      • R(h);P_SPINR(f)::QAB1(C)
      • R(f);N_GUARD,P_SPINR(h)::QAB1(C),XR(f)
      • R(f);N_PINS(G),P_SPINR(h)::R(J)+S(G)
      • R(h);N_PINS(G),P_SPINR(f)::R(J)+S(G)
      • B(a);S_CUTR(f)::QAB1(C)
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