MESON Chess Problem Database

Problem Display
PID: 23905 (6q1/8/1BB1Nr2/5P2/3N1P2/1PP1kPQ1/2RbP3/nK4n1 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

diagrammes, 1997

6q1/8/1BB1Nr2/5P2/3N1P2/1PP1kPQ1/2RbP3/nK4n1

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Qxg1#
    • 1...Qh7
      • 2.Qxg1#
    • 1...Qa8
      • 2.Qxg1#
    • 1...Qb8
      • 2.Qxg1#
    • 1...Qc8
      • 2.Qxg1#
    • 1...Qd8
      • 2.Qxg1#
    • 1...Qe8
      • 2.Qxg1#
    • 1...Qf8
      • 2.Qxg1#
    • 1...Qh8
      • 2.Qxg1#
    • 1...Bc1
      • 2.Sb5#
    • 1...Be1
      • 2.Sb5#
    • 1...Sxf3
      • 2.Qxf3#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Sc6#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...Sxb3
        • 2.Sxb3#
      • 1...Sxe2
        • 2.Sxe2#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Qb8
        • 2.Qxg1#
      • 1...Qd8
        • 2.Qxg1#
      • 1...Qf8
        • 2.Qxg1#
      • 1...Bxc3!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sb5#
      • 1...Qxe6
        • 2.Sxe6#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...Bxc3
        • 2.Rxc3#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...Sxb3
        • 2.Sxb3#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...Qb8
        • 2.Qxg1#
      • 1...Qd8
        • 2.Qxg1#
      • 1...Qf8
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_GUARD::QAB(G),XS(b)
    • B(c);::B(K)+S(H)
    • S(b);OGATE,P_SPINS(b),XP(F)::QAR1(G),XS(b)
  • Tries
    • Try
      • B(L);
      • Threat
        • B(K)+S(H)
      • Vars
        • R(e);XP(J)::B(K)+S(H),DCHECK,XR(e)
        • S(a);XR(B)::B(K)+S(H),DCHECK,XS(a)
        • S(a);XP(D)::B(K)+S(H),XS(a)
        • S(b);XP(C)::B(K)+S(H),XS(b)
        • S(b);OGATE,P_SPINS(b),XP(F)::QAR1(G),XS(b)
        • Q(f);N_GUARD::QAB(G),XS(b)
      • Refutation
        • B(c);XP(E)
  • Actual
    • Q(G);
    • Threat
      • B(K)+S(H)
    • Vars
      • Q(f);XS(M)::B(K)+S(H),XQ(f)
      • R(e);XP(J)::B(K)+S(H),DCHECK,XR(e)
      • R(e);XS(M)::B(K)+S(H),XR(e)
      • B(c);OGATE,XP(E)::R(B),XB(c)
      • S(a);XR(B)::B(K)+S(H),DCHECK,XS(a)
      • S(a);XP(D)::B(K)+S(H),XS(a)
      • S(b);OGATE,P_SPINS(b),XP(C)::QAR1(G),XS(b)
      • S(b);XP(F)::B(K)+S(H),XS(b)
      • Q(f);N_GUARD::QAB(G),XS(b)
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