MESON Chess Problem Database

Problem Display
PID: 166227 (8/5K2/3R2p1/1Np1kbp1/1p2P1R1/BpnP3N/8/1Q6 w - - 0 1)

Petite, Efren

1st Prize, Phenix, 2009

8/5K2/3R2p1/1Np1kbp1/1p2P1R1/BpnP3N/8/1Q6

#2

9 + 8

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Be6+
      • 2.Rxe6#
    • 1...Sxb1
      • 2.Rd5#
    • 1...Sd1
      • 2.Rd5#
    • 1...Sa2
      • 2.Rd5#
    • 1...Se2
      • 2.Rd5#
    • 1...Sa4
      • 2.Rd5#
    • 1...Sxb5
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...c4
      • 2.d4#
  • Tries
    • 1.Bb2?
      • threat
        • 2.Rd5#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Bxe4!
    • 1.Rxg5?
      • threat
        • 2.Re6#
      • 1...Sxb5
        • 2.Rd5#
      • 1...Sxe4!
    • 1.Qb2?
      • threat
        • 2.Rd5#
        • 2.Qh2#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Bxe4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qg3#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Bxe4
        • 2.Rxg5#
      • 1...Sxe4
        • 2.Bb2#
      • 1...Se2
        • 2.Rd5#
      • 1...Sd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(f);CHECK,N_GUARD::R1(H),XB(f)
    • S(b);N_GUARD,XQ(A)::R1(H)
    • S(b);N_GUARD::R1(H)
    • S(b);N_GUARD,XS(G)::R1(H)
    • S(b);N_GUARD::R1(H),XS(b)
    • P(d);N_GUARD::P(C)
  • Tries
    • Try
      • B(B);P_PINS(b)
      • Threat
        • R1(H)
      • Vars
        • B(f);CHECK,N_GUARD::R1(H),XB(f)
      • Refutation
        • B(f);XP(E)
    • Try
      • R(F);P_PINB(f),XP(g)
      • Threat
        • R1(H)
      • Vars
        • S(b);N_GUARD,XS(G)::R1(H)
      • Refutation
        • S(b);XP(E)
    • Try
      • Q(A);P_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);CHECK,N_GUARD::R1(H),XB(f)
      • Refutation
        • B(f);XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(f);CHECK,N_GUARD::R1(H),XB(f)
      • B(f);OGATEB,P_SPINB(f),XP(E)::R(F),XP(g)
      • S(b);OGATEB,P_SPINS(b),XP(E)::B(B)
      • S(b);N_GUARD::R1(H)
      • S(b);N_GUARD::R1(H),XS(b)
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