MESON Chess Problem Database

Problem Display
PID: 168417 (4N3/B6Q/2R3N1/4b3/b3kpP1/1P6/2P3R1/2nK4 w - - 0 1)

Petite, Efren

Probleemblad, 1960

4N3/B6Q/2R3N1/4b3/b3kpP1/1P6/2P3R1/2nK4

#2

10 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sh4#
    • 1...Kd5
      • 2.Se7#
  • Tries
    • 1.Sxf4+?
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kf3!
    • 1.Sxe5+?
      • 1...Kxe5
        • 2.Qf5#
      • 1...Kd5!
    • 1.Sf6+?
      • 1...Kf3
        • 2.Sh4#
        • 2.Qh3#
      • 1...Bxf6!
    • 1.Re2+?
      • 1...Kf3
        • 2.Qh3#
      • 1...Kd5
        • 2.Se7#
      • 1...Sxe2!
    • 1.Rc4+?
      • 1...Kf3
        • 2.Sh4#
        • 2.Qh3#
      • 1...Kd5
        • 2.Qg8#
        • 2.Qf7#
      • 1...Bd4!
    • 1.Qh1?
      • threat
        • 2.Re2#
      • 1...Kf3
        • 2.Rg1#
      • 1...Kd5
        • 2.Rd2#
      • 1...Se2
        • 2.Rxe2#
      • 1...f3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Rc4#
      • 1...Kf3
        • 2.Rc3#
      • 1...Kd5
        • 2.Rd6#
      • 1...Bxc6
        • 2.Qxc6#
      • 1...Bd4
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(G)
  • Tries
    • Try
      • S(G);CHECK,XP(d)
      • Vars
        • K(c);P-FLIGHT,XS(G)::QAR1(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(G);CHECK,XB(e)
      • Vars
        • K(c);P-FLIGHT,XS(G)::QAR1(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(J);CHECK
      • Refutation
        • B(e);XS(J)
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(I)
        • K(c);S_FLIGHT::S(G)
      • Refutation
        • S(a);XR(C)
    • Try
      • R(F);CHECK
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(C),DCHECK
      • Vars
        • K(c);S_FLIGHT::QAB(I)+R(C)
        • K(c);S_FLIGHT::QAB(I)+R(C),DCHECK
        • S(a);::QAB(I)+R(C),DCHECK,XS(a)
      • Refutation
        • P(d);
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+R(F),DCHECK
    • Vars
      • K(c);S_FLIGHT::QAB(I)+R(F),DCHECK
      • B(b);OGATE,P_SPINB(b),XR(F)::QAB(I),XB(b)
      • B(e);::QAB(I)+R(F),DCHECK
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