MESON Chess Problem Database

Problem Display
PID: 171063 (2r5/Q4P2/3P2p1/2q1N1K1/1pP2p2/4kP1N/4nR2/2nRB1b1 w - - 0 1)

Doukhan, Gerard

Wiedenhoff, Claude

Variantim, 1990

2r5/Q4P2/3P2p1/2q1N1K1/1pP2p2/4kP1N/4nR2/2nRB1b1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sg4#
      • 2.Bd2#
    • 1...Qb6
      • 2.Sg4#
    • 1...Qxa7
      • 2.Sg4#
    • 1...Bxf2
      • 2.Bxf2#
    • 1...Sa2
      • 2.Rd3#
    • 1...Sb3
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sd4
      • 2.Bd2#
  • Tries
    • 1.Kxg6?
      • threat
        • 2.Sg4#
      • 1...Bxf2
        • 2.Bxf2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Rg8+!
    • 1.Kh6?
      • threat
        • 2.Sg4#
      • 1...Bxf2
        • 2.Bxf2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Rh8+!
    • 1.Sxf4?
      • threat
        • 2.Sg2#
        • 2.Sd5#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sg2#
      • 1...Sd4
        • 2.Sg2#
      • 1...Sxf4!
    • 1.Rd5?
      • threat
        • 2.Sg4#
        • 2.Bd2#
      • 1...Bxf2
        • 2.Bd2#
        • 2.Bxf2#
      • 1...Sb3
        • 2.Sg4#
        • 2.Rd3#
      • 1...Sd3
        • 2.Sg4#
        • 2.Rxd3#
      • 1...Sd4
        • 2.Bd2#
      • 1...Qd4!
    • 1.Rxe2+?
      • 1...Sxe2
        • 2.Rd3#
      • 1...Kxe2!
    • 1.Qxc5+?
      • 1...Sd4
        • 2.Sg4#
        • 2.Bd2#
        • 2.Qxd4#
      • 1...Rxc5!
    • 1.Qa1?
      • threat
        • 2.Bd2#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qxd6
        • 2.Sg4#
      • 1...Qd4
        • 2.Sg4#
      • 1...Sb3
        • 2.Rd3#
      • 1...Sc3
        • 2.Qxc1#
      • 1...Qd5!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Sg4#
      • 1...Bxf2
        • 2.Bxf2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Qd4
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_PINS(G)::S(G)
    • Q(g);N_PINS(G),N_SPINQ(g),XQ(J)::S(G)
    • B(b);OGATE,XR(C)::B(B),XB(b)
    • S(a);N_GUARD::R1(A)
    • S(a);N_GUARD::R1(A),XS(a)
    • S(c);N_SPINQ(g),SBLOCK::B(B)
  • Tries
    • Try
      • K(H);N_SPINS(G),P-FLIGHT,XP(h)
      • Threat
        • S(G)
      • Vars
        • B(b);OGATE,XR(C)::B(B),XB(b)
        • S(a);N_GUARD::R1(A),XS(a)
      • Refutation
        • R(i);CHECK
    • Try
      • K(H);N_SPINS(G),S_FLIGHT
      • Threat
        • S(G)
      • Vars
        • B(b);OGATE,XR(C)::B(B),XB(b)
        • S(a);N_GUARD::R1(A),XS(a)
      • Refutation
        • R(i);CHECK
    • Try
      • S(E);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::R1(A),XS(a)
        • S(c);::S(E)
        • S(c);N_SPINQ(g)::S(E)
      • Refutation
        • S(c);XS(E)
    • Try
      • R(A);N_SPINS(G)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_SPINQ(g)::B(B)
      • Refutation
        • Q(g);
    • Try
      • R(C);CHECK,XS(c)
      • Vars
        • S(a);SBLOCK,XR(C)::R1(A)
      • Refutation
        • K(d);N_SPINQ(g),P-FLIGHT,XR(C)
    • Try
      • Q(J);CHECK,N_SPINS(G),XQ(g)
      • Refutation
        • R(i);P_PINS(G),XQ(J)
    • Try
      • Q(J);N_PINQ(g)
      • Threat
        • B(B)
      • Vars
        • Q(g);CHECK,OGATE,XS(G)::QAR2(J),XQ(g)
        • Q(g);N_PINS(G),XP(I)::S(G)
        • Q(g);N_PINS(G)::S(G)
        • S(a);N_GUARD::R1(A)
        • S(c);N_GUARD::QAB(J),XS(a)
      • Refutation
        • Q(g);
  • Actual
    • K(H);N_SPINS(G),S_FLIGHT
    • Threat
      • S(G)
    • Vars
      • B(b);OGATE,XR(C)::B(B),XB(b)
      • S(a);N_GUARD::R1(A),XS(a)
      • Q(g);P_PINS(G)::B(B)
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