MESON Chess Problem Database

Problem Display
PID: 77991 (Q7/3q4/2p5/4PRp1/3Nk1P1/5R2/B1pp1BP1/Kn1b4 w - - 0 1)

Petite, Efren

Probleemblad, 2007

Q7/3q4/2p5/4PRp1/3Nk1P1/5R2/B1pp1BP1/Kn1b4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Qxc6#
    • 1...Qe7
      • 2.Qxc6#
    • 1...Qg7
      • 2.Qxc6#
    • 1...Qh7
      • 2.Qxc6#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.Re3#
      • 1...Qd4+
        • 2.Sxd4#
      • 1...Qxf5
        • 2.Qa4#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Qd3
        • 2.Sd4#
      • 1...Qa7
        • 2.Sxa7#
      • 1...Bxf3!
    • 1.Qxc6+?
      • 1...Qd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Qxc6!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Re3#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qxf5
        • 2.Sxc6#
      • 1...Bxf3
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD,P_PINB(B)::QAB(J),XP(g)
    • Q(h);N_GUARD::QAB(J),XP(g)
  • Tries
    • Try
      • S(F);XP(g)
      • Threat
        • R1(E)
      • Vars
        • Q(h);CHECK,N_GUARD::QAB(J)+S(F),XQ(h)
        • Q(h);N_GUARD,XR(I)::QAR(J)
        • Q(h);OGATE,P_SPINQ(h),XS(F)::QAB(J),XQ(h)
        • Q(h);N_GUARD::QAB(J)+S(F)
        • Q(h);N_GUARD,P_PINB(B)::QAB(J)+S(F),XQ(h)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(J);CHECK,XP(g)
      • Refutation
        • Q(h);XQ(J)
  • Actual
    • Q(J);N_PINP(g)
    • Threat
      • R1(E)
    • Vars
      • Q(h);CHECK,OGATE,P_SPINQ(h),XS(F)::QAR1(J),XQ(h)
      • Q(h);N_GUARD,XR(I)::QAR(J)+S(F),XP(g)
      • B(b);N_GUARD,XR(E)::QAB(J),XP(c)
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