MESON Chess Problem Database

Problem Display
PID: 191937 (8/7B/4pQ2/5p2/R2bPk2/3RrrpK/3n2p1/2BN2N1 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2019

8/7B/4pQ2/5p2/R2bPk2/3RrrpK/3n2p1/2BN2N1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rdxd4#
      • 2.Raxd4#
      • 2.Qxd4#
    • 1...Rxe4
      • 2.Rxf3#
    • 1...Be5
      • 2.Qh4#
      • 2.Qh6#
    • 1...Sxe4
      • 2.Se2#
    • 1...e5
      • 2.Qh4#
      • 2.Qxf5#
  • Tries
    • 1.Se2+?
      • 1...Kxe4
        • 2.Rdxd4#
        • 2.Raxd4#
        • 2.Qxd4#
      • 1...Rxe2!
    • 1.Qxe6?
      • threat
        • 2.Qxf5#
      • 1...fxe4
        • 2.Qf5#
      • 1...Kg5!
  • Keys
    • 1.exf5!
      • threat
        • 2.fxe6#
      • 1...Ke4
        • 2.Rdxd4#
        • 2.Raxd4#
        • 2.Qxd4#
      • 1...exf5
        • 2.Qxf5#
      • 1...Re4
        • 2.Rxf3#
      • 1...Re5
        • 2.Qh4#
      • 1...Sc4
        • 2.Rxd4#
      • 1...Se4
        • 2.Se2#
      • 1...e5
        • 2.Qh4#

This is a version of 138905

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,P_SPINS(a),SBLOCK,XP(G)::R1(D),XR(d)
    • S(a);P_SPINR(c),SBLOCK,XP(G)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • R(c);P_SPINS(a),XS(C)
    • Try
      • Q(H);N_PINP(h),XP(i)
      • Threat
        • QAR1(H),XP(h)
      • Vars
        • P(h);XP(G)::QAR1(H)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • P(G);P_PINB(f),XP(h)
    • Threat
      • QAR(H)+P(G),XP(i)
    • Vars
      • P(i);OGATE,P_SPINP(i),XP(G)::QAR1(H),XP(i)
      • R(c);N_SPINB(f),OGATE,P_SPINS(a),SBLOCK::R1(D),XR(d)
      • R(c);P_SPINS(a),SBLOCK::QAR2(H)
      • S(a);N_GUARD,N_SPINB(f),P_SPINR(c)::R(D),XB(f)
      • S(a);N_SPINB(f),P_SPINR(c),SBLOCK::S(C)
      • P(i);SBLOCK::QAR2(H)
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