MESON Chess Problem Database

Problem Display
PID: 168419 (K7/n2p1b2/1p1B1r1R/1rNkP3/Q1p5/N2pp1P1/1P6/1B1R2q1 w - - 0 1)

Petite, Efren

1st HM., Pituk-90 JT, 1994

K7/n2p1b2/1p1B1r1R/1rNkP3/Q1p5/N2pp1P1/1P6/1B1R2q1

#2

11 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rxd3#
    • 1...Sc6
      • 2.Qxc4#
    • 1...c3
      • 2.Qe4#
  • Tries
    • 1.Rxd3+?
      • 1...cxd3
        • 2.Qe4#
      • 1...Kc6!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Qxc4#
      • 1...Kd4
        • 2.Se1#
      • 1...Ke4
        • 2.Se1#
      • 1...Kc6
        • 2.Sb4#
      • 1...Ke6
        • 2.Sf4#
      • 1...cxd3
        • 2.Qc4#
      • 1...Rb4
        • 2.Sf4#
      • 1...Rc5
        • 2.Sf4#
      • 1...Rf4
        • 2.Sb4#
      • 1...c3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(f);P-FLIGHT::R1(B),XP(b)
    • S(i);SBLOCK::QAB1(F),XP(d)
    • P(d);OGATE::QAB1(F)
  • Tries
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • P(d);OGATE,XR(B)::QAB1(F)
      • Refutation
        • K(f);P_SPINR(e),S_FLIGHT
  • Actual
    • S(G);XP(b)
    • Threat
      • QAB1(F),XP(d)
    • Vars
      • K(f);P-FLIGHT,P_SPINP(d)::R(B)+S(G)
      • K(f);P_SPINP(d),S_FLIGHT::B(A)+S(G)
      • K(f);P_SPINR(e),S_FLIGHT::S(G)
      • K(f);P_SPINR(h),S_FLIGHT::S(G)
      • P(d);P_SPINP(d),XS(G)::QAB1(F)
      • R(e);::R(B)+S(G),DCHECK
      • R(h);::R(B)+S(G),DCHECK
      • P(d);::QAB1(F)
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