MESON Chess Problem Database

Problem Display
PID: 149798 (rnb2NQ1/r2p4/p1k5/K7/1P2R3/8/8/7B w - - 0 1)

Zepler, Erich Ernest

Source?, 0000

rnb2NQ1/r2p4/p1k5/K7/1P2R3/8/8/7B

#2

6 + 7

5454 Near Snap 2014
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Re6#
    • 1...d6
      • 2.Rc4#
  • Tries
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kb7!
    • 1.Qe6+?
      • 1...Kb7
        • 2.Qb6#
      • 1...Kc7
        • 2.Qb6#
      • 1...d6
        • 2.Rc4#
      • 1...dxe6!
    • 1.Qg6+?
      • 1...Kb7
        • 2.Qb6#
      • 1...Kc7
        • 2.Qb6#
      • 1...d6
        • 2.Rc4#
        • 2.Re7#
      • 1...Kd5!
  • Keys
    • 1.Qg1!
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kb7
        • 2.Qb6#
      • 1...Kc7
        • 2.Qb6#
      • 1...d5
        • 2.Qb6#
      • 1...Rb7
        • 2.Qc5#
      • 1...Rc7
        • 2.Re6#
      • 1...Bb7
        • 2.Qc5#
      • 1...d6
        • 2.Rc4#

This anticipates 44886(1971)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::B(A)+R(C),DCHECK
    • P(d);SBLOCK::B(A)+R(C),DCHECK
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(F)
        • K(b);OGATE,P-FLIGHT::QAB1(F)
        • P(d);P_SPINP(d)::B(A)+R(C),DCHECK
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(F)
        • K(b);OGATE,P-FLIGHT::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::QAR1(F)
      • K(b);P-FLIGHT::QAB1(F)
      • P(d);SBLOCK::QAR1(F)
      • R(c);SBLOCK::QAR1(F)
      • R(c);SBLOCK::B(A)+R(C),DCHECK
      • B(g);SBLOCK::QAR1(F)
      • P(d);SBLOCK::B(A)+R(C),DCHECK
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