MESON Chess Problem Database

Problem Display
PID: 69857 (2K5/1n2NBP1/2Nk1pp1/1P3rR1/4r3/3p2P1/4RB2/2Q5 w - - 0 1)

Saunders, Denis M

The Problemist Supplement, 2006

2K5/1n2NBP1/2Nk1pp1/1P3rR1/4r3/3p2P1/4RB2/2Q5

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Re6#
    • 1...Rb4
      • 2.Re6#
    • 1...Rc4
      • 2.Re6#
    • 1...Rd4
      • 2.Re6#
    • 1...Ref4
      • 2.Re6#
    • 1...Rg4
      • 2.Re6#
    • 1...Rh4
      • 2.Re6#
    • 1...Re6
      • 2.Rxe6#
    • 1...Rxf2
      • 2.Rd5#
    • 1...Rf3
      • 2.Rd5#
    • 1...Rff4
      • 2.Rd5#
    • 1...Rd5
      • 2.Rxd5#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Bc7#
      • 1...Rc4
        • 2.Re6#
      • 1...Rxe7!
    • 1.Ba7?
      • threat
        • 2.Bb8#
      • 1...Rc4
        • 2.Re6#
      • 1...Rxe7!
    • 1.Rxf5?
      • threat
        • 2.Rd5#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Rd4
        • 2.Re6#
        • 2.Rxf6#
      • 1...Re5!
    • 1.Qa3+?
      • 1...Rb4
        • 2.Re6#
      • 1...Rc5
        • 2.Rd5#
      • 1...Sc5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc7#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Kxe7
        • 2.Qc7#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(b);OGATE::R1(B)
    • R(b);OGATE,P_PINS(G)::R1(B)
    • R(b);OGATE::R1(B),XR(b)
    • R(c);OGATE,XB(C)::R1(F)
    • R(c);OGATE::R1(F)
    • R(c);OGATE::R1(F),XR(c)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • R(b);OGATE,P_PINS(G)::R1(B)
      • Refutation
        • R(b);XS(H)
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • R(b);OGATE,P_PINS(G)::R1(B)
      • Refutation
        • R(b);XS(H)
    • Try
      • R(F);XR(c)
      • Threat
        • R1(F)
      • Vars
        • P(f);XR(F)::S(H),XP(f)
      • Refutation
        • R(b);
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);OGATE,P_SPINR(b)::R1(B)
        • R(c);OGATE,P_PINS(G),P_SPINR(c)::R1(F)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • S(G);
    • Threat
      • QAB1(A)
    • Vars
      • R(b);CHECK,N_GUARD::S(G),XR(b)
      • K(d);OGATEB,P_SPINR(b),S_FLIGHT,XS(G)::QAB1(A)
      • K(d);S_FLIGHT,XS(H)::QAR2(A)
      • S(g);N_GUARD::QAB1(A),XS(g)
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