MESON Chess Problem Database

Problem Display
PID: 218571 (2B5/3p4/K2P2P1/2pkN1nR/2N5/6Q1/4P3/2B5 w - - 0 1)

Robbins, Alexander Henry

Cincinnati Commercial, 1882

2B5/3p4/K2P2P1/2pkN1nR/2N5/6Q1/4P3/2B5

#2

10 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd3#
    • 1...Ke4
      • 2.Qd3#
  • Tries
    • 1.Sf3?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Bb7#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Sg4?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kc6
        • 2.Bb7#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Sf7?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kc6
        • 2.Bb7#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Bxg5?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Ke6!
    • 1.Bb7+?
      • 1...Kd4
        • 2.Bb2#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Ke6!
    • 1.Rxg5?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Ke6!
  • Keys
    • 1.Sc6!
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kxc6
        • 2.Bb7#
      • 1...Ke6
        • 2.Qe5#
      • 1...dxc6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • K(b);S_FLIGHT::QAB1(C)
  • Tries
    • Try
      • S(E);P_PINS(c)
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::QAR1(C)
        • K(b);N_SPINS(c),S_FLIGHT::B(J)
        • K(b);N_SPINS(c),P_SPINP(d),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XS(D)
    • Try
      • S(E);P_PINS(c)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::QAR1(C)
        • K(b);N_SPINS(c),S_FLIGHT::B(J)
        • K(b);N_SPINS(c),P_SPINP(d),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XS(D)
    • Try
      • S(E);P_PINS(c)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::QAR1(C)
        • K(b);N_SPINS(c),S_FLIGHT::B(J)
        • K(b);N_SPINS(c),P_SPINP(d),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XS(D)
    • Try
      • B(A);XS(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • B(J);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);XS(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
  • Actual
    • S(E);P_PINS(c)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT,XS(D)::QAB1(C)
      • K(b);N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::B(J)
      • K(b);N_SPINS(c),P_SPINP(d),S_FLIGHT::QAR1(C)
      • P(d);SBLOCK,XS(E)::QAR2(C)
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