MESON Chess Problem Database

Problem Display
PID: 93041 (3B2n1/K1R1p1P1/2pP1k1P/2R2p1B/3NqP2/3b4/1Q6/8 w - - 0 1)

Eriksson, Finn Olof

Schackvarlden, 1935

3B2n1/K1R1p1P1/2pP1k1P/2R2p1B/3NqP2/3b4/1Q6/8

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rxe7?
      • threat
        • 2.Re6#
        • 2.Rf7#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Sxh6
        • 2.Rf7#
      • 1...Sxe7
        • 2.g8S#
      • 1...Qe6
        • 2.Sxe6#
        • 2.Rxe6#
        • 2.Rf7#
      • 1...Qxe7+!
    • 1.Qg2?
      • threat
        • 2.Qg5#
        • 2.Qg6#
      • 1...Qxd4
        • 2.Qg6#
      • 1...Qxf4
        • 2.Qg6#
      • 1...Qxg2!
  • Keys
    • 1.dxe7!
      • threat
        • 2.e8S#
      • 1...Qxd4
        • 2.Rxc6#
      • 1...Qxe7
        • 2.Rxc6#
      • 1...Sxe7
        • 2.g8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(I);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);OGATE,P_PINR(D),P_SPINQ(b),XS(B)::QAB(A),XQ(b)
        • S(g);XP(G)::B(K)+R(I),DCHECK
        • S(g);OGATE,P_SPINS(g),XR(I)::P=S
      • Refutation
        • Q(b);CHECK,P_SPINQ(b),XR(I)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);P_PINR(D),XS(B)::QAR1(A)
        • Q(b);XP(C)::QAR1(A)
      • Refutation
        • Q(b);XQ(A)
  • Actual
    • P(F);XP(f)
    • Threat
      • P=S
    • Vars
      • Q(b);N_GUARD,P_PINR(D),P_SPINQ(b),XS(B)::R(I),XP(d)
      • Q(b);N_GUARD,P_PINR(I),P_SPINQ(b),XP(F)::R(D),XP(d)
      • S(g);OGATE,P_SPINS(g),XP(F)::P=S
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