MESON Chess Problem Database

Problem Display
PID: 241060 (8/5R2/3P2K1/4pN2/2P1kp2/4p1P1/2P1Q2P/5n2 w - - 0 1)

Bruchner, Siegfried

Schweizerische Schachzeitung, 1989

8/5R2/3P2K1/4pN2/2P1kp2/4p1P1/2P1Q2P/5n2

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...fxg3
      • 2.Qg4#
    • 1...f3
      • 2.Qd3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qd3#
      • 1...exd4
        • 2.Re7#
      • 1...Kxd4!
    • 1.Qd1?
      • threat
        • 2.Qd5#
      • 1...fxg3
        • 2.Qg4#
      • 1...Sd2!
    • 1.Qxf1?
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qd3#
      • 1...fxg3!
  • Keys
    • 1.gxf4!
      • 1...Kxf4
        • 2.Sg3#
      • 1...Sxh2
        • 2.Qxe3#
      • 1...exf4
        • 2.Re7#
      • 1...Sd2
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATEB,XP(D)::QAR2(B)
    • P(d);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • P(e);OGATEB,SBLOCK,XS(F)::R(I)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XS(F)
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • QAB1(B)
      • Vars
        • P(d);OGATEB,XP(D)::QAR2(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);N_PINP(b),XS(a)
      • Vars
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • P(d);XP(D)
  • Actual
    • P(D);XP(d)
    • Vars
      • K(c);N_SPINP(b),P-FLIGHT,XP(D)::R(I)+S(F)
      • S(a);N_GUARD,XP(C)::QAR1(B),XP(b)
      • P(e);OGATEB,SBLOCK,XP(D)::R(I)
      • S(a);N_GUARD::QAR1(B),XP(b)
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