MESON Chess Problem Database

Problem Display
PID: 71972 (8/8/6K1/3N1p2/2QPkBB1/4q1p1/2P5/b2R3b w - - 0 1)

Anonymous

Original for 08. WCCT, 2007

8/8/6K1/3N1p2/2QPkBB1/4q1p1/2P5/b2R3b

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Re1#
    • 1...Qe1
      • 2.Rxe1#
    • 1...Qd3
      • 2.cxd3#
    • 1...Qf3
      • 2.Bxf5#
    • 1...Bf3
      • 2.Bxf5#
  • Tries
    • 1.Re1?
      • threat
        • 2.Rxe3#
      • 1...Qe2
        • 2.Rxe2#
      • 1...Qxe1!
    • 1.Rf1?
      • threat
        • 2.Sf6#
        • 2.Bxf5#
      • 1...Qxf4
        • 2.Rxf4#
      • 1...fxg4
        • 2.Sf6#
      • 1...Qf3
        • 2.Bxf5#
      • 1...Bf3
        • 2.Bxf5#
      • 1...Qf2!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Rxe3#
      • 1...Qxd4
        • 2.Bxf5#
        • 2.Re3#
      • 1...Qxf4
        • 2.Sf6#
      • 1...Qxd3
        • 2.cxd3#
      • 1...Qc1
        • 2.Bxf5#
      • 1...Qg1
        • 2.Bxf5#
      • 1...Qd2
        • 2.Bxf5#
      • 1...Qf2
        • 2.Bxf5#
      • 1...Qe1
        • 2.Bxf5#
      • 1...Qe2
        • 2.Bxf5#
      • 1...Qf3
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATEB,P_SPINQ(c),XP(D)::R(A)
    • Q(c);OGATEB::R(A),XQ(c)
    • Q(c);OGATE::P(B),XQ(c)
    • Q(c);SBLOCK::B(F),XP(f)
    • B(b);SBLOCK::B(F),XP(f)
  • Tries
    • Try
      • R(A);P_PINQ(c)
      • Threat
        • R1(A),XQ(c)
      • Vars
        • Q(c);OGATEB::R(A),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XR(A)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATE,XB(E)::R1(A),XQ(c)
        • P(f);XB(F)::S(G)
        • Q(c);::B(F),XP(f)
        • B(b);::B(F),XP(f)
      • Refutation
        • Q(c);
  • Actual
    • R(A);
    • Threat
      • R1(A),XQ(c)
    • Vars
      • Q(c);SBLOCK,XB(E)::S(G)
      • Q(c);OGATE,XR(A)::P(B),XQ(c)
      • Q(c);::B(F),XP(f)
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