MESON Chess Problem Database

Problem Display
PID: 17231 (Knr5/RPkpP3/p7/3b4/1Q1N4/8/8/8 w - - 0 1)

ten Cate, Pieter

Munchner Schachzeitung, 1925

Knr5/RPkpP3/p7/3b4/1Q1N4/8/8/8

#2

6 + 6

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb7+
      • 2.Rxb7#
    • 1...Sc6+
      • 2.b8Q#
      • 2.b8B#
  • Tries
    • 1.Qc5+?
      • 1...Sc6+
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...Bc6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qd6#
      • 1...Bxb7+
        • 2.Qxb7#
      • 1...Sc6+
        • 2.b8Q#
        • 2.b8B#
      • 1...Kc6
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...d6
        • 2.Qxd6#
      • 1...Bc6
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,P_SPINB(a),XP(D)::R1(C),XB(a)
    • S(e);CHECK,N_PINP(D)::P=Q
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XP(D)::QAR1(A),XB(a)
      • S(e);CHECK,N_PINP(D),SBLOCK::P=Q
      • K(c);N_PINP(D),P-FLIGHT::PXR(f)=Q
      • P(d);::QAB1(A),XP(d)
      • B(a);SBLOCK::QAB(A)
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