MESON Chess Problem Database

Problem Display
PID: 144467 (5B1b/4R3/rP4r1/p2knpP1/R1N5/4PN2/B5Q1/K7 w - - 0 1)

Spencer, JS

Chess, 1954

5B1b/4R3/rP4r1/p2knpP1/R1N5/4PN2/B5Q1/K7

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Se1#
      • 2.Sfxe5#
  • Tries
    • 1.Se1+?
      • 1...Kc5
        • 2.Rxe5#
      • 1...Sf3+!
    • 1.Sg1+?
      • 1...Kc5
        • 2.Rxe5#
      • 1...Sf3+!
    • 1.Sfd2+?
      • 1...Kc5
        • 2.Rxe5#
      • 1...Sf3+!
    • 1.Sh2+?
      • 1...Kc5
        • 2.Rxe5#
      • 1...Sf3+!
    • 1.Sd4+?
      • 1...Kc5
        • 2.Rxe5#
        • 2.Re6#
        • 2.Rc7#
      • 1...Sf3!
    • 1.Sh4+?
      • 1...Kc5
        • 2.Rxe5#
      • 1...Sf3+!
    • 1.Scxe5+?
      • 1...Kd6
        • 2.Re6#
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Re8#
      • 1...Kc5!
    • 1.Rxa5+?
      • 1...Ke4
        • 2.Se1#
        • 2.Sfxe5#
        • 2.Bb1#
      • 1...Kc6
        • 2.Sd4#
        • 2.Sfxe5#
        • 2.Rc7#
      • 1...Rxa5!
    • 1.Rxe5+?
      • 1...Bxe5+
        • 2.Sd4#
        • 2.Scxe5#
      • 1...Kc6!
  • Keys
    • 1.Re6!
      • threat
        • 2.Scxe5#
      • 1...Sd3+
        • 2.Sd4#
        • 2.Sb2#
        • 2.Sce5#
      • 1...Sxf3+
        • 2.Sb2#
        • 2.Se5#
      • 1...Sxc4+
        • 2.Sd4#
      • 1...Sg4+
        • 2.Sd4#
        • 2.Sb2#
        • 2.Sce5#
      • 1...Sc6+
        • 2.Sd4#
        • 2.Sb2#
        • 2.Sce5#
      • 1...Sd7+
        • 2.Sd4#
        • 2.Sb2#
        • 2.Sce5#
      • 1...Sf7+
        • 2.Sd4#
        • 2.Sb2#
        • 2.Sce5#
      • 1...Ke4
        • 2.Se1#
        • 2.Sfxe5#
      • 1...Kxe6
        • 2.Scxe5#
      • 1...Rxb6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(K)+R(J),DCHECK,XS(c)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(K)+R(J),DCHECK,XS(c)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(K)+R(J),DCHECK,XS(c)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(K)+R(J),DCHECK,XS(c)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • S(E);CHECK
      • Refutation
        • S(c);P_PINS(E),P_SPINS(c)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(K)+R(J),DCHECK,XS(c)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • S(G);CHECK,P_SPINS(G),XS(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK,XP(a)
      • Refutation
        • R(e);P_PINB(B),XR(F)
    • Try
      • R(J);CHECK,P_SPINR(J),XS(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(J);
    • Threat
      • B(B)+S(G),XS(c)
    • Vars
      • S(c);CHECK,N_GUARD,P_SPINS(c),XS(G)::QAB(C)+S(E)
      • K(b);S_FLIGHT,XR(J)::B(B)+S(G),XS(c)
      • R(e);XP(I)::B(B)+S(G),DCHECK,XR(e)
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