MESON Chess Problem Database

Problem Display
PID: 168372 (8/4B3/3p2pr/N1pk4/b2pR3/1q1Q1RKp/B4Nn1/2r5 w - - 0 1)

Petite, Efren

Die Schwalbe, 1990

8/4B3/3p2pr/N1pk4/b2pR3/1q1Q1RKp/B4Nn1/2r5

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qxd4#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Bxb3+?
      • 1...Rc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...c4
        • 2.Qxd4#
      • 1...Bxb3!
    • 1.Rf6?
      • threat
        • 2.Rxd6#
      • 1...g5
        • 2.Rf5#
      • 1...c4!
    • 1.Re5+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...dxe5!
    • 1.Qa6?
      • threat
        • 2.Qxd6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...g5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...c4
        • 2.Qxd4#
      • 1...g5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(g);N_GUARD,N_SPINQ(c)::QAR1(C),XP(f)
    • P(j);N_GUARD::R(D)
  • Tries
    • Try
      • B(A);CHECK,XQ(c)
      • Vars
        • P(g);N_SPINP(f),P_SPINP(g)::QAR1(C),XP(f)
      • Refutation
        • B(e);XB(A)
    • Try
      • R(D);P_SPINQ(C)
      • Threat
        • R1(D),XP(i)
      • Vars
        • P(j);N_GUARD::R(D)
      • Refutation
        • P(g);N_SPINQ(c)
    • Try
      • R(F);CHECK
      • Vars
        • K(h);N_SPINP(f),N_SPINQ(c),P-FLIGHT,XR(F)::QAR1(C)
      • Refutation
        • P(i);XR(F)
    • Try
      • Q(C);N_PINP(f),P_SPINR(D)
      • Threat
        • QAR1(C),XP(i)
      • Vars
        • B(e);N_GUARD::QAB1(C),XB(e)
      • Refutation
        • P(j);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • P(g);N_GUARD,N_SPINQ(c)::QAR1(C),XP(f)
      • P(j);N_GUARD::R(D)
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