MESON Chess Problem Database

Problem Display
PID: 99139 (7B/3n4/3pQ3/1pR1qN2/4kN1R/6K1/5P1p/7b w - - 0 1)

Gab, Wolfgang

Magyar Sakkelet, 1982

7B/3n4/3pQ3/1pR1qN2/4kN1R/6K1/5P1p/7b

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Rc4#
  • Tries
    • 1.Qc4+?
      • 1...Kxf5
        • 2.Rh5#
      • 1...Qd4
        • 2.Se2#
        • 2.Sg2#
        • 2.Sd3#
        • 2.Sh3#
        • 2.Sh5#
        • 2.Se6#
        • 2.Sg6#
        • 2.Sxd6#
        • 2.Qxd4#
      • 1...bxc4!
    • 1.Qd5+?
      • 1...Kxf5
        • 2.Rh5#
      • 1...Qxd5!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qd3#
      • 1...Qc3+
        • 2.Sd3#
      • 1...Qxf4+
        • 2.Rxf4#
      • 1...Qg7+
        • 2.Sg6#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Sxc5
        • 2.Qxe5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::R(E)
  • Tries
    • Try
      • Q(G);CHECK,N_PINQ(e)
      • Vars
        • K(c);P_SPINQ(e),S_FLIGHT,XS(F)::R(D)
      • Refutation
        • P(d);XQ(G)
    • Try
      • Q(G);CHECK,N_PINQ(e)
      • Vars
        • K(c);P_SPINQ(e),S_FLIGHT,XS(F)::R(D)
      • Refutation
        • Q(e);N_PINS(C),XQ(G)
  • Actual
    • Q(G);N_PINQ(e),XP(f)
    • Threat
      • QAB1(G)
    • Vars
      • Q(e);CHECK,N_PINS(C)::R(D)+S(C)
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(C)::R1(D),XQ(e)
      • K(c);OGATEB,P_SPINQ(e),S_FLIGHT,XS(F)::QAB1(G)
      • Q(e);XQ(G)::S(F),XQ(e)
      • S(g);N_GUARD,XR(E)::QAR1(G),XQ(e)
      • Q(e);N_GUARD,N_PINS(C)::QAR1(G),XQ(e)
      • Q(e);N_GUARD,N_PINS(C)::QAB1(G),XQ(e)
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