MESON Chess Problem Database

Problem Display
PID: 173144 (Q1qnk3/n1R2p1N/1BP5/6N1/K7/8/4B3/4R3 w - - 0 1)

Kapros, Jorge Marcelo

2nd HM., Problem Observer, 2000

Q1qnk3/n1R2p1N/1BP5/6N1/K7/8/4B3/4R3

#2

9 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4+
      • 2.Bxg4#
    • 1...Qa6+
      • 2.Bxa6#
    • 1...Qb7
      • 2.Bd1#
      • 2.Bf1#
      • 2.Bd3#
      • 2.Bf3#
      • 2.Bc4#
      • 2.Bg4#
      • 2.Bb5#
      • 2.Bh5#
      • 2.Ba6#
    • 1...f5
      • 2.Bh5#
    • 1...f6
      • 2.Bh5#
  • Tries
    • 1.Bh5+?
      • 1...Qe6
        • 2.Bxf7#
        • 2.Rxe6#
      • 1...Se6!
    • 1.Qxc8?
      • threat
        • 2.Bd1#
        • 2.Bf1#
        • 2.Bd3#
        • 2.Bf3#
        • 2.Bc4#
        • 2.Bg4#
        • 2.Bb5#
        • 2.Bh5#
        • 2.Ba6#
        • 2.Qd7#
      • 1...Sxc6
        • 2.Bb5#
        • 2.Qd7#
      • 1...Sb5
        • 2.Bd1#
        • 2.Bf1#
        • 2.Bd3#
        • 2.Bf3#
        • 2.Bc4#
        • 2.Bg4#
        • 2.Bxb5#
        • 2.Bh5#
        • 2.Qd7#
      • 1...Sxc8!
  • Keys
    • 1.Rxf7!
      • threat
        • 2.Sf6#
      • 1...Qg4+
        • 2.Bxg4#
      • 1...Qa6+
        • 2.Bxa6#
      • 1...Qxc6+
        • 2.Bb5#
      • 1...Sxf7
        • 2.Bh5#
      • 1...Qf5
        • 2.Qxd8#
      • 1...Qe6
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,N_GUARD,P_SPINS(d)::R(A)+B(B),XQ(c)
    • P(b);::R(A)+B(B),DCHECK
  • Tries
    • Try
      • B(B);CHECK,P_PINP(b)
      • Refutation
        • S(d);P_SPINQ(c),P_SPINS(d)
    • Try
      • Q(I);P_PINS(d),XQ(c)
      • Threat
        • DUALS(10)
      • Refutation
        • S(a);N_SPINS(d),XQ(I)
  • Actual
    • R(G);XP(b)
    • Threat
      • S(H)
    • Vars
      • Q(c);CHECK,N_GUARD,P_SPINS(d)::R(A)+B(B),XQ(c)
      • Q(c);CHECK,N_GUARD,P_SPINS(d),XP(F)::R(A)+B(B)
      • S(d);N_GUARD,P_SPINQ(c),XR(G)::R(A)+B(B)
      • Q(c);OGATE,P_SPINS(d)::QAR1(I),XS(d)
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