MESON Chess Problem Database

Problem Display
PID: 7328 (8/1pB5/8/2P2r2/1p1kPp2/1p1N4/1P2B1N1/2Q2K2 w - - 0 1)

Petite, Efren

Problemas, 1999

8/1pB5/8/2P2r2/1p1kPp2/1p1N4/1P2B1N1/2Q2K2

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qc4#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qc4#
      • 1...Rxc5
        • 2.Qd2#
        • 2.Qd1#
      • 1...b5!
    • 1.Sdxf4?
      • threat
        • 2.Qe3#
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qc4#
      • 1...Rxc5
        • 2.Qe3#
      • 1...b5
        • 2.Qe3#
      • 1...Rxf4+!
    • 1.Se5?
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qc4#
      • 1...b5!
    • 1.Be5+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...Rxe5!
    • 1.Qe3+?
      • 1...Kc4
        • 2.Sc1#
        • 2.Sde1#
        • 2.Sf2#
        • 2.Sdxf4#
        • 2.Se5#
      • 1...fxe3+!
    • 1.Qc3+?
      • 1...Kxe4
        • 2.Qc4#
      • 1...bxc3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qxb4#
      • 1...Kc4
        • 2.Qxb4#
      • 1...Kxe4
        • 2.Sf2#
      • 1...Rxc5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XP(G)::QAR2(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(A)
      • Refutation
        • P(f);
    • Try
      • S(F);P_SPINS(F),XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_PINS(F),SBLOCK,XP(H)::QAB1(A)
        • P(f);::QAB1(A)
      • Refutation
        • R(e);CHECK,XS(F)
    • Try
      • S(F);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT,XP(G)::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • B(I);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(G)::QAR2(A)
      • Refutation
        • R(e);XB(I)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(G)::QAR2(A)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A),XP(b)
    • Vars
      • K(c);P-FLIGHT::QAR1(A),XP(b)
      • K(c);P-FLIGHT,XP(G)::S(F)
      • R(e);SBLOCK,XP(H)::QAR(A)+S(F)
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