MESON Chess Problem Database

Problem Display
PID: 108164 (4k2r/p2N1N1R/Kn4Bp/B2Q2pq/3p1R2/b7/4r3/8 w k - 0 1)

Goldstein, Alexander

1/2 Place, Match: Netherlands - Poland, 1937

4k2r/p2N1N1R/Kn4Bp/B2Q2pq/3p1R2/b7/4r3/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Rxh8#
    • 1...Sa4
      • 2.Sd6#
    • 1...Sc4
      • 2.Sd6#
    • 1...Sxd5
      • 2.Sd6#
    • 1...Sxd7
      • 2.Sd6#
    • 1...Sa8
      • 2.Sd6#
    • 1...Sc8
      • 2.Sd6#
  • Tries
    • 1.Re4+?
      • 1...Be7
        • 2.Rxh8#
      • 1...Rxe4!
    • 1.Qe6+?
      • 1...Be7
        • 2.Rxh8#
      • 1...Rxe6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qd8#
      • 1...Ke7
        • 2.Sxh8#
      • 1...Kf8
        • 2.Sxg5#
      • 1...0-0
        • 2.Sxh6#
      • 1...Sxd5
        • 2.Sd6#
      • 1...Sd7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(a);SBLOCK,S_CUTB(b)::R(H),XR(j)
    • S(f);::B(E)+S(G),DCHECK
    • S(f);XQ(C)::B(E)+S(G),DCHECK
    • S(f);XS(F)::B(E)+S(G),DCHECK
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(H),XR(j)
      • Refutation
        • R(a);XR(A)
    • Try
      • Q(C);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(H),XR(j)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • S(F);
    • Threat
      • QAR1(C)
    • Vars
      • K(i);P-FLIGHT::R(H)+S(G),XR(j)
      • K(i);P-FLIGHT::R(A)+S(G),XP(d)
      • K(i);0-0::QAB(C)+S(G),DCHECK,XP(g)
      • S(f);XQ(C)::B(E)+S(G),DCHECK
      • S(f);::B(E)+S(G),DCHECK
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