MESON Chess Problem Database

Problem Display
PID: 140950 (6B1/2p1BP2/4RP1n/PpNk1qR1/p2n4/2QNpP1b/1p2p3/1Kb5 w - - 0 1)

Degener, Udo

Trommler, Sven

Sp. Prize, Boletim da UBP, 1993

6B1/2p1BP2/4RP1n/PpNk1qR1/p2n4/2QNpP1b/1p2p3/1Kb5

#2

12 + 12

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sb4#
      • 2.Sf4#
      • 2.Rgxe5#
    • 1...Qxg5
      • 2.Sb4#
    • 1...Sc2
      • 2.Sf4#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sf4#
      • 1...Kxe6
        • 2.f8S#
      • 1...Sxe6
        • 2.Sb4#
      • 1...Qxg5!
    • 1.Rxf5+?
      • 1...Sdxf5
        • 2.Sb4#
        • 2.Sf4#
      • 1...Shxf5
        • 2.Sb4#
        • 2.Sf4#
      • 1...Bxf5!
    • 1.Re4?
      • threat
        • 2.Sb4#
      • 1...Kc6
        • 2.Sb4#
      • 1...Sc6
        • 2.Sf4#
      • 1...b4
        • 2.Sxb4#
      • 1...Sc2!
    • 1.Re5+?
      • 1...Qxe5
        • 2.Sb4#
      • 1...Kc6!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sxc7#
      • 1...Kxe6
        • 2.f8S#
      • 1...Sxe6
        • 2.Sb4#
      • 1...c5
        • 2.Sc7#
        • 2.Rd6#
      • 1...c6
        • 2.Sc7#
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(j);N_PINS(C),N_SPINQ(j),XR(G)::S(C)
    • S(g);N_PINS(C)::S(C)
    • P(l);N_GUARD::R1(H)
  • Tries
    • Try
      • S(F);N_SPINS(C)
      • Threat
        • S(C)
      • Vars
        • K(i);N_SPINQ(j),S_FLIGHT,XR(H)::P=S
        • S(g);SBLOCK,XR(H)::S(C)
      • Refutation
        • Q(j);N_SPINQ(j),XR(G)
    • Try
      • R(G);CHECK,N_SPINS(C),XQ(j)
      • Refutation
        • B(e);P_PINS(C),XR(G)
    • Try
      • R(H);N_SPINS(C)
      • Threat
        • S(C)
      • Vars
        • K(i);N_SPINQ(j),S_FLIGHT::S(C)
        • S(g);SBLOCK::S(C)
        • P(h);::S(C),XP(h)
      • Refutation
        • S(g);
    • Try
      • R(H);CHECK,N_PINQ(j)
      • Vars
        • Q(j);N_PINS(C),P_SPINQ(j),XR(H)::S(C)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F),XP(l)
    • Vars
      • K(i);N_SPINQ(j),S_FLIGHT,XR(H)::P=S
      • S(g);SBLOCK,XR(H)::S(F)
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