MESON Chess Problem Database

Problem Display
PID: 51596 (1r1B4/1P3Q2/2k5/b1Prp3/P3n3/KN3R2/N5R1/7B w - - 0 1)

ten Cate, Pieter

The Guardian, 1967

1r1B4/1P3Q2/2k5/b1Prp3/P3n3/KN3R2/N5R1/7B

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Be1
      • 2.Qc7#
    • 1...Bd2
      • 2.Qc7#
    • 1...Bc3
      • 2.Qc7#
    • 1...Bb4+
      • 2.Sxb4#
    • 1...Bb6
      • 2.Sb4#
    • 1...Bc7
      • 2.Qxc7#
    • 1...Bxd8
      • 2.Sb4#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Sxa5#
      • 1...Bb4+
        • 2.Sxb4#
      • 1...Rxc5
        • 2.Rf6#
      • 1...Bxd8
        • 2.Sb4#
      • 1...Sxc5
        • 2.Rf6#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Ra8
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Be1
        • 2.Qc7#
      • 1...Bd2
        • 2.Qc7#
      • 1...Bc3
        • 2.Qc7#
      • 1...Bb6
        • 2.Sb4#
      • 1...Sc3
        • 2.Rf6#
      • 1...Rd3!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Sxa5#
      • 1...Bb4+
        • 2.Sxb4#
      • 1...Rxc5
        • 2.Rg6#
      • 1...Bxc3
        • 2.Qc7#
      • 1...Bxd8
        • 2.Sb4#
      • 1...Sxc3
        • 2.Rg6#
      • 1...Sxc5
        • 2.Rg6#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Ra8
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Bb6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE::PXR(f)=Q
    • B(b);N_GUARD::QAR1(J)
    • B(b);CHECK,N_GUARD::S(B),XB(b)
    • B(b);N_GUARD::S(B)
    • B(b);N_GUARD::QAR1(J),XB(b)
    • B(b);N_GUARD,XB(K)::S(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • S(E),XB(b)
      • Vars
        • B(b);CHECK,N_GUARD::S(B),XB(b)
        • R(c);N_GUARD,P_SPINR(c),S_CUTS(a),S_CUTS(a),XP(H)::R(F)
        • B(b);N_GUARD,XB(K)::S(B)
        • S(a);N_GUARD,P_SPINS(a),S_CUTR(c),XP(H)::R(F)
        • B(b);N_GUARD::QAR1(J),XB(b)
        • R(f);OGATE::PXR(f)=Q
        • B(b);N_GUARD::QAR1(J)
        • B(b);N_GUARD::S(B)
        • S(a);N_GUARD,S_CUTR(c)::R(F)
      • Refutation
        • R(c);P_PINS(E)
  • Actual
    • R(F);
    • Threat
      • S(E),XB(b)
    • Vars
      • B(b);CHECK,N_GUARD::S(B),XB(b)
      • R(c);N_GUARD,P_SPINR(c),S_CUTS(a),S_CUTS(a),XP(H)::R(C)
      • B(b);N_GUARD,XR(F)::QAR1(J)
      • B(b);N_GUARD,XB(K)::S(B)
      • S(a);N_GUARD,S_CUTR(c),XR(F)::R(C)
      • S(a);N_GUARD,P_SPINS(a),S_CUTR(c),XP(H)::R(C)
      • B(b);N_GUARD::QAR1(J),XB(b)
      • R(f);OGATE::PXR(f)=Q
      • B(b);N_GUARD::S(B)
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