MESON Chess Problem Database

Problem Display
PID: 75526 (1bn2N2/2p5/Q4K2/2Pk2P1/3Pp2R/2P2prb/8/8 w - - 0 1)

Alliney, Frederico

Sp. Comm., Scacco!, 1984

1bn2N2/2p5/Q4K2/2Pk2P1/3Pp2R/2P2prb/8/8

#2

8 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qe6#
    • 1...Bf1
      • 2.Qe6#
    • 1...Bg2
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...e3
      • 2.c4#
    • 1...c6
      • 2.Qa2#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf4#
        • 2.c4#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Rg4
        • 2.c4#
      • 1...Bf1
        • 2.Sf4#
      • 1...Sd6
        • 2.Sf4#
      • 1...e3
        • 2.c4#
      • 1...c6
        • 2.Qa2#
        • 2.c4#
      • 1...Sb6!
    • 1.Qb7+?
      • 1...c6
        • 2.Qb3#
      • 1...Kc4!
    • 1.Qa8+?
      • 1...c6
        • 2.Qa2#
      • 1...Kc4!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Sf4#
      • 1...Sb6
        • 2.Se7#
      • 1...Rg4
        • 2.Qe6#
      • 1...e3
        • 2.c4#
      • 1...c6
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);S_CUTB(c)::QAB1(F)
    • B(c);N_GUARD::QAB1(F)
    • B(c);N_GUARD::QAB1(F),XB(c)
    • P(d);::P(A)
    • P(f);SBLOCK::QAB(F)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);OGATE,XS(H)::QAB1(F),XB(c)
        • R(b);::P(A)
        • B(c);::S(H)
        • S(h);::S(H)
        • P(d);::P(A)
      • Refutation
        • S(h);
    • Try
      • Q(F);CHECK
      • Vars
        • P(f);P_SPINP(f),SBLOCK::QAB(F)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • P(f);P_SPINP(f),SBLOCK::QAB(F)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(h);N_GUARD::S(H)
      • R(b);S_CUTB(c)::QAB1(F)
      • P(d);::P(A)
      • P(f);SBLOCK::QAB(F)
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