MESON Chess Problem Database

Problem Display
PID: 80673 (R4b2/2pkp1n1/7R/1N1P2N1/3KB3/B7/8/8 w - - 0 1)

Welburn, T

The Field, 1948

(First published on Sat Mar 6 1948)

R4b2/2pkp1n1/7R/1N1P2N1/3KB3/B7/8/8

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Se6+
      • 2.dxe6#
    • 1...c5+
      • 2.dxc5 ep#
    • 1...c6
      • 2.dxc6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Se5#
      • 1...Se6+
        • 2.dxe6#
      • 1...c5+
        • 2.dxc5 ep#
      • 1...e5+
        • 2.Sxe5#
      • 1...Sf5+!
    • 1.Se6?
      • threat
        • 2.Sc5#
        • 2.Sxf8#
        • 2.Rd8#
      • 1...Sxe6+
        • 2.dxe6#
      • 1...c5+
        • 2.Sxc5#
        • 2.dxc5 ep#
      • 1...Sf5+!
    • 1.Sf7?
      • threat
        • 2.Se5#
        • 2.Rd8#
      • 1...Se6+
        • 2.dxe6#
      • 1...c5+
        • 2.dxc5 ep#
      • 1...e5+
        • 2.Sxe5#
      • 1...Sf5+!
  • Keys
    • 1.Rh7!
      • 1...Sf5+
        • 2.Bxf5#
      • 1...Se6+
        • 2.dxe6#
      • 1...c5+
        • 2.dxc5 ep#
      • 1...e5+
        • 2.dxe5 ep#
      • 1...Sh5
        • 2.Bf5#
      • 1...Se8
        • 2.Bf5#
      • 1...c6
        • 2.dxc6#
      • 1...e6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(d);CHECK,OGATE::P(E),XS(d)
    • P(a);CHECK,OGATE::P(E),XP(a),EP
    • P(a);OGATE::P(E),XP(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(d);CHECK,OGATE::P(E),XS(d)
        • P(a);CHECK,OGATE::P(E),XP(a),EP
        • P(c);CHECK::S(F),XP(c)
      • Refutation
        • S(d);CHECK
    • Try
      • S(F);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);CHECK,OGATE,XS(F)::P(E),XS(d)
      • Refutation
        • S(d);CHECK
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);CHECK,OGATE::P(E),XS(d)
        • P(a);CHECK,OGATE::P(E),XP(a),EP
        • P(c);CHECK::S(F),XP(c)
      • Refutation
        • S(d);CHECK
  • Actual
    • R(G);
    • Vars
      • S(d);CHECK,N_GUARD,P_SPINP(c)::B(C),XS(d)
      • S(d);CHECK,OGATE,P_SPINP(c)::P(E),XS(d)
      • P(a);CHECK,OGATE::P(E),XP(a),EP
      • P(c);CHECK,OGATE,P_SPINS(d)::P(E),XP(c),EP
      • S(d);N_GUARD,P_SPINP(c)::B(C)
      • P(a);OGATE::P(E),XP(a)
      • P(c);OGATE,P_SPINS(d)::P(E),XP(c)
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