MESON Chess Problem Database

Problem Display
PID: 2296 (1Rb3nK/3P1p1P/5k1p/B5NP/4q2P/7B/8/3nRr2 w - - 0 1)

Davis, Henry Hosey

Source?, 0000

1Rb3nK/3P1p1P/5k1p/B5NP/4q2P/7B/8/3nRr2

#2

10 + 8

2794 Terms & Themes of Chess Problems 1907

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.d8Q#
    • 1...Qb1
      • 2.hxg8S#
    • 1...Qh1
      • 2.hxg8S#
    • 1...Qc2
      • 2.hxg8S#
    • 1...Qg2
      • 2.hxg8S#
    • 1...Qd3
      • 2.hxg8S#
    • 1...Qf3
      • 2.hxg8S#
    • 1...Qd5
      • 2.hxg8S#
    • 1...Qf5
      • 2.hxg8S#
    • 1...Qc6
      • 2.hxg8S#
    • 1...Qg6
      • 2.Rb6#
    • 1...Qb7
      • 2.hxg8S#
    • 1...Qxh7+
      • 2.Sxh7#
    • 1...Qa8
      • 2.hxg8S#
    • 1...Qa4
      • 2.hxg8S#
    • 1...Qb4
      • 2.hxg8S#
    • 1...Qc4
      • 2.hxg8S#
    • 1...Qd4
      • 2.hxg8S#
    • 1...Qf4
      • 2.hxg8S#
    • 1...Qe5
      • 2.hxg8S#
    • 1...Qe6
      • 2.hxg8S#
    • 1...Qe7
      • 2.hxg8S#
    • 1...Qe8
      • 2.dxe8S#
  • Tries
    • 1.Sxe4+?
      • 1...Ke7
        • 2.d8Q#
      • 1...Ke5!
    • 1.Rxe4?
      • threat
        • 2.Rb6#
        • 2.hxg8S#
      • 1...Bxd7
        • 2.hxg8S#
      • 1...Bb7
        • 2.hxg8S#
      • 1...Se7!
    • 1.d8Q+?
      • 1...Ke5
        • 2.Bc7#
        • 2.Rxe4#
      • 1...Qe7
        • 2.hxg8S#
      • 1...Se7!
  • Keys
    • 1.Rb5!
      • threat
        • 2.hxg8S#
      • 1...Qxh7+
        • 2.Sxh7#
      • 1...Ke7
        • 2.d8Q#
      • 1...Se7
        • 2.Sxe4#
      • 1...Qg6
        • 2.Rb6#
      • 1...Qe8
        • 2.dxe8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 19
  • Sets
    • K(d);P_SPINQ(c),S_FLIGHT::P=Q
    • Q(c);::PXS(h)=S
    • Q(c);N_GUARD::R(I)
    • Q(c);CHECK,XP(H)::S(E),XQ(c)
    • Q(c);OGATE::PXQ(c)=S
  • Tries
    • Try
      • S(E);CHECK,XQ(c)
      • Vars
        • K(d);S_FLIGHT::P=Q
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(A);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XP(G)::PXS(h)=S
        • B(g);::PXS(h)=S
      • Refutation
        • S(h);
    • Try
      • P(G);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::PXS(h)=S
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • R(I);
    • Threat
      • PXS(h)=S
    • Vars
      • Q(c);CHECK,XP(H)::S(E),XQ(c)
      • K(d);P_SPINQ(c),S_FLIGHT::P=Q
      • S(h);SBLOCK::S(E),XQ(c)
      • Q(c);N_GUARD::R(I)
      • Q(c);OGATE::PXQ(c)=S
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