MESON Chess Problem Database

Problem Display
PID: 188351 (3n3B/2nR3p/6p1/5k2/2r1NN2/b3R1K1/8/1Q6 w - - 0 1)

di Scala, Pascal

Phenix, 1992

3n3B/2nR3p/6p1/5k2/2r1NN2/b3R1K1/8/1Q6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sa6
      • 2.Rd5#
    • 1...Sce6
      • 2.Rd5#
    • 1...Sa8
      • 2.Rd5#
    • 1...Se8
      • 2.Rd5#
    • 1...Sc6
      • 2.Rf7#
    • 1...Sde6
      • 2.Rf7#
    • 1...Sb7
      • 2.Rf7#
    • 1...Sf7
      • 2.Rxf7#
    • 1...g5
      • 2.Sd6#
  • Tries
    • 1.Sh3?
      • threat
        • 2.Sd6#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Ke6
        • 2.Sc5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Rc2!
    • 1.Qh1?
      • threat
        • 2.Qh3#
      • 1...g5
        • 2.Qxh7#
      • 1...Rxe4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sd6#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Kxe6
        • 2.Sc5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Scxe6
        • 2.Rd5#
      • 1...Sdxe6
        • 2.Rf7#
      • 1...Rc2
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • S(e);N_GUARD::R(F)
    • S(e);N_GUARD::R(F),XS(e)
    • S(g);N_GUARD::R(F)
    • S(g);N_GUARD::R(F),XS(g)
    • P(d);SBLOCK::QAB(A)+S(D),DCHECK
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB(A)+S(D),DCHECK
      • Vars
        • B(a);CHECK::QAB(A)+S(D),DCHECK,XB(a)
        • K(c);S_FLIGHT::R(B)+S(D),DCHECK
        • R(b);OGATE,P_SPINR(b),XS(D)::QAB1(A),XR(b)
      • Refutation
        • R(b);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(d);OGATEB::QAB(A),XP(f)
      • Refutation
        • R(b);XS(D)
  • Actual
    • S(E);
    • Threat
      • QAB(A)+S(D),DCHECK
    • Vars
      • B(a);CHECK::QAB(A)+S(D),DCHECK,XB(a)
      • K(c);S_FLIGHT,XS(E)::R(B)+S(D),DCHECK
      • R(b);OGATE,P_SPINR(b),XS(D)::QAB1(A),XR(b)
      • S(e);N_GUARD,SBLOCK,XS(E)::R(F)
      • S(g);N_GUARD,SBLOCK,XS(E)::R(F)
      • R(b);N_GUARD::S(E)
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