MESON Chess Problem Database

Problem Display
PID: 150571 (8/1p1R4/1K2p3/3b1n1R/2Nk1p1p/3P4/3P1r2/2N3Qn w - - 0 1)

Ahues, Herbert Siegfried Oskar

Source?, 0000

8/1p1R4/1K2p3/3b1n1R/2Nk1p1p/3P4/3P1r2/2N3Qn

#2

8 + 9

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qg4#
  • Tries
    • 1.Rxf5?
      • threat
        • 2.Rxf4#
      • 1...exf5
        • 2.Qg7#
      • 1...Sg3
        • 2.Qxf2#
      • 1...f3
        • 2.Rf4#
        • 2.Qg4#
      • 1...e5!
    • 1.Qxf2+?
      • 1...Se3
        • 2.Qxf4#
      • 1...Sxf2!
    • 1.Qg7+?
      • 1...e5
        • 2.Qxe5#
      • 1...Sxg7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf3#
      • 1...Kxe5
        • 2.Qg7#
      • 1...Se3
        • 2.Sb3#
      • 1...Sd6
        • 2.Se2#
      • 1...f3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAR(B)
  • Tries
    • Try
      • R(F);XS(g)
      • Threat
        • R(F),XP(d)
      • Vars
        • P(h);N_GUARD,XR(F)::QAB(B)
        • S(a);N_GUARD::QAB(B),XR(b)
      • Refutation
        • P(h);
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • S(g);P_SPINS(g)::QAR2(B),XP(d)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK,N_PINR(b)
      • Vars
        • P(h);P_SPINP(h)::QAB1(B),XP(h)
      • Refutation
        • S(g);XQ(B)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);N_SPINB(f),N_SPINR(b),OGATEB,P_SPINS(g),S_FLIGHT,XS(E)::QAB(B)
      • S(g);N_SPINR(b)::S(A)
      • S(g);N_SPINB(f)::S(A)
      • P(d);::S(E),XP(d)
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