MESON Chess Problem Database

Problem Display
PID: 176074 (1k1NN2R/p1pK1P2/n1B1P3/2pp4/8/6B1/1q2r3/bR3b2 w - - 0 1)

Schafft, Willy

Schach-Echo, 1939

1k1NN2R/p1pK1P2/n1B1P3/2pp4/8/6B1/1q2r3/bR3b2

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Rxb5#
    • 1...Sb4
      • 2.Bxc7#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Sb7#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...Qb7
        • 2.Sxb7#
      • 1...Rh2!
    • 1.Sg7?
      • threat
        • 2.Sb7#
      • 1...Rxe6
        • 2.Sdxe6#
      • 1...Qb7
        • 2.Sxb7#
      • 1...Rh2!
  • Keys
    • 1.Sxc7!
      • threat
        • 2.Sxa6#
      • 1...Sxc7
        • 2.Bxc7#
      • 1...Qb7
        • 2.Rxb7#
      • 1...Re5
        • 2.Sb7#
      • 1...Sb4
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE,P_PINB(C)::R(A),XQ(c)
    • S(g);N_GUARD,N_SPINQ(c)::B(B),XP(i)
  • Tries
    • Try
      • S(H);
      • Threat
        • R(I)+S(G)
      • Vars
        • R(d);XP(D)::R(I)+S(G),XR(d)
        • Q(c);::R(I)+S(G),XQ(c)
      • Refutation
        • R(d);
    • Try
      • S(H);
      • Threat
        • R(I)+S(G)
      • Vars
        • R(d);XP(D)::R(I)+S(G),XR(d)
        • Q(c);::R(I)+S(G),XQ(c)
      • Refutation
        • R(d);
  • Actual
    • S(H);XP(i)
    • Threat
      • B(B)+S(H),DCHECK,XS(g)
    • Vars
      • S(g);OGATE,P_SPINS(g),XS(H)::B(B),XS(g)
      • Q(c);OGATE,P_PINS(H)::R1(A),XQ(c)
      • R(d);::R(I)+S(G)
      • S(g);N_SPINQ(c)::B(B)+S(H),DCHECK
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Developed and maintained by Brian Stephenson.
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