MESON Chess Problem Database

Problem Display
PID: 50710 (1bnnN2R/p1P1k3/P3p2p/1R4pK/1r4Q1/B6B/8/8 w - - 0 1)

Conolly, M

Chess Amateur (The), 1907

1bnnN2R/p1P1k3/P3p2p/1R4pK/1r4Q1/B6B/8/8

#2

9 + 9

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qxe6#
    • 1...e5
      • 2.Qd7#
  • Tries
    • 1.Bxb4+?
      • 1...Kd7
        • 2.cxb8S#
      • 1...Kf7
        • 2.Rf8#
        • 2.Qf3#
        • 2.cxd8S#
      • 1...Sd6!
    • 1.Qxb4+?
      • 1...Kd7
        • 2.cxb8S#
      • 1...Kf7
        • 2.Rf8#
        • 2.Qf8#
        • 2.cxd8S#
      • 1...Sd6!
    • 1.Qxg5+?
      • 1...Kd7
        • 2.cxb8S#
      • 1...Kf7
        • 2.Qf6#
        • 2.Qg7#
        • 2.cxd8S#
      • 1...hxg5!
    • 1.cxd8Q+?
      • 1...Kf7
        • 2.Qxe6#
        • 2.Qf6#
      • 1...Kxd8!
  • Keys
    • 1.Rb7!
      • 1...Kd7
        • 2.cxb8S#
      • 1...Kf7
        • 2.cxd8S#
      • 1...Bxc7
        • 2.Rxc7#
      • 1...Sxb7
        • 2.Qxe6#
      • 1...Sb6
        • 2.c8S#
      • 1...Sd6
        • 2.c8S#
      • 1...Sc6
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qxe6#
      • 1...e5
        • 2.Qd7#

This anticipates 156497(1926)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(i);N_GUARD::QAR1(C),XP(c)
    • P(c);OGATE::QAR1(C)
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • K(f);P-FLIGHT,P_SPINP(c)::PXB(g)=S
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(C);CHECK,XR(a)
      • Vars
        • K(f);P-FLIGHT,P_SPINP(c)::PXB(g)=S
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(f);N_SPINR(a),P-FLIGHT,P_SPINP(c)::PXB(g)=S
      • Refutation
        • P(d);XQ(C)
    • Try
      • P(G);CHECK,XS(i)
      • Refutation
        • K(f);N_SPINR(a),S_FLIGHT,XQ(G)
  • Actual
    • R(D);
    • Vars
      • K(f);N_SPINR(a),P-FLIGHT,P_SPINP(c)::PXB(g)=S
      • K(f);N_SPINR(a),P-FLIGHT::PXS(i)=S
      • B(g);OGATE,P_SPINB(g),XP(G)::R(D),XB(g)
      • S(i);N_GUARD,XR(D)::QAR1(C),XP(c)
      • S(h);OGATE::P=S
      • S(h);N_SPINR(a),OGATE::P=S
      • S(i);N_GUARD::QAR1(C),XP(c)
      • P(c);OGATE::QAR1(C)
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