MESON Chess Problem Database

Problem Display
PID: 199589 (6K1/Q1Pr1p2/R2Pkp2/1N3p1n/B2R1P2/1b4p1/8/2n5 w - - 0 1)

Vaughan, Colin V

The Problemist, 1982

6K1/Q1Pr1p2/R2Pkp2/1N3p1n/B2R1P2/1b4p1/8/2n5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.c8Q#
      • 2.c8B#
    • 1...Rxc7
      • 2.Sxc7#
    • 1...Re7
      • 2.d7#
    • 1...Rd8+
      • 2.cxd8S#
    • 1...Sa2
      • 2.Bxb3#
    • 1...Se2
      • 2.Bxb3#
    • 1...Sd3
      • 2.Bxb3#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Qe3#
      • 1...Rd8+
        • 2.cxd8S#
      • 1...Rxd6
        • 2.c8Q#
        • 2.c8B#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Re7
        • 2.d7#
      • 1...Sd3
        • 2.Bxb3#
      • 1...Bd5
        • 2.Sd4#
      • 1...Bc2!
    • 1.Re4+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Qd4#
      • 1...fxe4!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qe3#
      • 1...Rd8+
        • 2.cxd8S#
      • 1...Rxd6
        • 2.c8Q#
        • 2.c8B#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Sxd3
        • 2.Bxb3#
      • 1...Re7
        • 2.d7#
      • 1...Bd5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(h);P_SPINR(h),XP(F)::P=Q
    • R(h);XP(H)::S(D),XR(h)
    • R(h);OGATE,SBLOCK::R(E)+P(F)
    • R(h);CHECK,OGATE::PXR(h)=S
    • S(a);N_GUARD::B(A),XB(b)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR(G)
      • Vars
        • R(h);CHECK,OGATE::PXR(h)=S
        • R(h);P_SPINR(h),XP(F)::P=Q
        • R(h);XP(H)::S(D),XR(h)
        • R(h);OGATE,SBLOCK::R(E)+P(F)
        • S(a);N_GUARD::B(A),XB(b)
        • B(b);SBLOCK::S(D)
      • Refutation
        • B(b);
    • Try
      • R(B);CHECK
      • Refutation
        • P(d);XR(B)
  • Actual
    • R(B);
    • Threat
      • QAR(G)
    • Vars
      • R(h);CHECK,OGATE::PXR(h)=S
      • R(h);P_SPINR(h),XP(F)::P=Q
      • R(h);XP(H)::S(D),XR(h)
      • S(a);N_GUARD,XR(B)::B(A),XB(b)
      • R(h);OGATE,SBLOCK::R(E)+P(F)
      • B(b);SBLOCK::S(D)
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