MESON Chess Problem Database

Problem Display
PID: 75993 (5BBn/3p1rpp/3Nk1p1/1p2P1nR/3R3b/3N1bp1/8/K1Q5 w - - 0 1)

Onkoud, Abdelaziz

6th Comm., StrateGems, 2007

5BBn/3p1rpp/3Nk1p1/1p2P1nR/3R3b/3N1bp1/8/K1Q5

#2

9 + 12

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Sc5#
    • 1...Se4
      • 2.Sf4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sxg7#
      • 1...gxf5
        • 2.Rd6#
      • 1...d5
        • 2.Qc8#
      • 1...d6
        • 2.Qc8#
      • 1...Kxf5!
    • 1.Se8?
      • threat
        • 2.Sxg7#
      • 1...d5
        • 2.Qc8#
      • 1...d6
        • 2.Qc8#
      • 1...Kf5!
    • 1.Bxf7+?
      • 1...Sgxf7
        • 2.Sf4#
        • 2.Sc5#
      • 1...Shxf7!
    • 1.Qe3?
      • threat
        • 2.Sf4#
        • 2.Sc5#
      • 1...Sh3
        • 2.Sc5#
      • 1...Se4
        • 2.Sf4#
      • 1...Be4!
    • 1.Qc4+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...bxc4!
    • 1.Qc5?
      • threat
        • 2.Sf4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sh3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qe8#
      • 1...Sh3
        • 2.Sc5#
      • 1...Se4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);::S(C)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G),XP(j)
      • Vars
        • P(g);SBLOCK,XS(G)::R1(D)
        • P(h);OGATEB::QAB(B)
      • Refutation
        • K(f);N_SPINR(i),P_SPINS(e),S_FLIGHT,XS(G)
    • Try
      • S(G);
      • Threat
        • S(G),XP(j)
      • Vars
        • P(h);OGATEB::QAB(B)
      • Refutation
        • K(f);N_SPINR(i),P_SPINS(e),S_FLIGHT
    • Try
      • B(I);CHECK,XR(i)
      • Refutation
        • S(l);XB(I)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::S(C)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);
      • Threat
        • S(C)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • S(e);
  • Actual
    • Q(B);P_PINP(h)
    • Threat
      • QAR2(B)
    • Vars
      • S(e);::S(C)
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