MESON Chess Problem Database

Problem Display
PID: 8205 (2K1R3/4B3/3Pr1R1/3pkN2/4n3/4N3/8/1Q5B w - - 0 1)

ten Cate, Pieter

The Problemist, 1995

2K1R3/4B3/3Pr1R1/3pkN2/4n3/4N3/8/1Q5B

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Bxd6#
    • 1...Sxd6+
      • 2.Bxd6#
    • 1...d4
      • 2.Qxe4#
  • Tries
    • 1.Bf6+?
      • 1...Kf4
        • 2.Rg4#
      • 1...Sxf6!
    • 1.Qb2+?
      • 1...Kf4
        • 2.Rg4#
      • 1...Sc3
        • 2.Qh2#
      • 1...d4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Qxe4#
      • 1...Sxd6+
        • 2.Bxd6#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Kxf5
        • 2.Rg5#
      • 1...Sd2
        • 2.Bf6#
      • 1...Sf2
        • 2.Bf6#
      • 1...Sc3
        • 2.Bf6#
      • 1...Sg3
        • 2.Bf6#
      • 1...Sc5
        • 2.Bf6#
      • 1...Sg5
        • 2.Bf6#
      • 1...Sf6
        • 2.Bxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATE,XP(E)::R(I)+B(G),DCHECK,XR(d)
    • S(a);CHECK,OGATE,XP(E)::B(G),XS(a)
    • P(b);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • B(G);CHECK,P_PINR(d)
      • Vars
        • K(c);N_SPINR(d),S_FLIGHT::R1(F)
      • Refutation
        • S(a);XB(G)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(F)
        • S(a);N_GUARD,P_SPINS(a)::QAB(A)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • S(C);XP(b)
    • Threat
      • QAR1(A),XS(a)
    • Vars
      • S(a);CHECK,OGATE,XP(E)::B(G),XS(a)
      • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XS(C)::QAR2(A)
      • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XS(D)::R1(F)
      • S(a);N_GUARD::B(G)
      • S(a);N_GUARD::B(G),XS(a)
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