MESON Chess Problem Database

Problem Display
PID: 117443 (1n3B2/8/8/1N4pK/PnkPr1Q1/1prb4/1ppRR1N1/1q3B2 w - - 0 1)

Loustau, Jean-Marc

Phenix, 1991

1n3B2/8/8/1N4pK/PnkPr1Q1/1prb4/1ppRR1N1/1q3B2

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sxe3#
    • 1...Rxd4
      • 2.Se3#
      • 2.Qxd4#
    • 1...Rf4
      • 2.Se3#
    • 1...Rxg4
      • 2.Se3#
  • Tries
    • 1.Sa3+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Rxe4?
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Qe6#
      • 1...Bxf1
        • 2.d5#
      • 1...Be2
        • 2.d5#
      • 1...Sd5
        • 2.Sa3#
      • 1...Qe1!
  • Keys
    • 1.d5!
      • threat
        • 2.Se3#
      • 1...Kxd5
        • 2.Qxe4#
      • 1...Bxe2
        • 2.Sa3#
      • 1...Sxd5
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(i);N_GUARD::S(D),XR(i)
    • R(i);N_GUARD::S(D)
    • R(i);N_GUARD,XQ(G)::S(D)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINB(f),P_SPINR(i),XP(F)::QAR1(G),XR(i)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • R(C);P_PINB(f),XR(i)
      • Threat
        • S(D)
      • Vars
        • K(h);N_SPINB(f),S_FLIGHT::QAB1(G)
        • B(f);N_SPINB(f),XB(A)::R(C)+P(F)
        • B(f);P_PINQ(G)::R(C)+P(F)
        • S(g);SBLOCK::S(H)
      • Refutation
        • Q(a);
  • Actual
    • P(F);P_PINR(i)
    • Threat
      • S(D)
    • Vars
      • K(h);N_SPINR(i),P_SPINB(f),S_FLIGHT,XP(F)::QAB1(G),XR(i)
      • B(f);P_PINQ(G),P_SPINB(f),XR(C)::S(H)
      • S(g);SBLOCK,XP(F)::R(C),XR(i)
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