MESON Chess Problem Database

Problem Display
PID: 229075 (b1K1R2n/5p2/3B1p1r/1QPk4/8/1P2P3/8/2r5 w - - 0 1)

van Dijk, Johannes

Noord-Hollandsch Dagblad, 1926

b1K1R2n/5p2/3B1p1r/1QPk4/8/1P2P3/8/2r5

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.bxc4#
    • 1...Rxc5+
      • 2.Qxc5#
    • 1...Bc6
      • 2.Qd3#
    • 1...Bb7+
      • 2.Qxb7#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Qd7#
      • 1...Rxc5+
        • 2.Qxc5#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Bc6
        • 2.Qd3#
      • 1...f5!
    • 1.c6+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Kxd6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bf8#
      • 1...Rxc5+
        • 2.Bc7#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Bc6
        • 2.Qf5#
      • 1...f5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE::P(A),XR(a)
    • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::QAR1(C),XR(a)
    • B(f);N_PINP(D),SBLOCK::QAR2(C)
    • B(f);CHECK,N_GUARD::QAB(C),XB(f)
    • P(c);N_GUARD::R1(G)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR2(C)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::QAR1(C),XR(a)
        • B(f);CHECK,N_GUARD::QAB(C),XB(f)
        • B(f);N_PINP(D),SBLOCK::QAR2(C)
      • Refutation
        • P(c);
    • Try
      • P(D);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(C),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+B(E)
    • Vars
      • R(a);CHECK,SBLOCK,XP(D)::QAR(C)+B(E)
      • B(f);CHECK,N_GUARD::QAB(C),XB(f)
      • B(f);N_PINP(D),SBLOCK::QAR2(C)
      • P(c);N_GUARD::R1(G)
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