MESON Chess Problem Database

Problem Display
PID: 55543 (2N5/n5P1/1bp3R1/prkq2QK/PpP5/1BBp1p2/1P1P4/2R5 w - - 0 1)

Mansfield, Comins

Comm., 64 Shakhmatnoe obozrenie, 1975

2N5/n5P1/1bp3R1/prkq2QK/PpP5/1BBp1p2/1P1P4/2R5

#2

12 + 10

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qxg5+
      • 2.Rxg5#
  • Tries
    • 1.Bf6?
      • threat
        • 2.cxb5#
        • 2.cxd5#
      • 1...Qxg5+
        • 2.Rxg5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qf5
        • 2.Qxf5#
        • 2.cxb5#
      • 1...Sxc8!
    • 1.Rxc6+?
      • 1...Sxc6
        • 2.Qxd5#
      • 1...Kxc6!
    • 1.cxd5?
      • threat
        • 2.Be5#
        • 2.Bf6#
        • 2.Qe3#
        • 2.Qe7#
        • 2.dxc6#
        • 2.d6#
      • 1...Sxc8
        • 2.Be5#
        • 2.Rxc6#
        • 2.Qe3#
        • 2.dxc6#
        • 2.d6#
      • 1...cxd5
        • 2.Be5#
        • 2.Bf6#
        • 2.Qe7#
        • 2.Qxd5#
      • 1...Bc7
        • 2.Be5#
        • 2.Bf6#
        • 2.Qe3#
        • 2.d6#
      • 1...Bd8
        • 2.Be5#
        • 2.Bf6#
        • 2.Qe3#
      • 1...bxc3!
  • Keys
    • 1.Be5!
      • threat
        • 2.cxd5#
      • 1...Qxc4
        • 2.Bf6#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Qe4
        • 2.Qe7#
      • 1...Qe6
        • 2.Qe3#
      • 1...Qf7
        • 2.Qe3#
      • 1...Qg8
        • 2.Qe3#
        • 2.Qe7#
      • 1...Qd4
        • 2.Bd6#
      • 1...Qd6
        • 2.cxb5#
      • 1...Qd7
        • 2.cxb5#
      • 1...Qd8
        • 2.cxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(g);::QAR2(H),XQ(g)
    • Q(g);::QAR(H),XQ(g)
    • Q(g);CHECK,N_SPINQ(g),OGATE,XQ(H)::R(J),XQ(g)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,N_SPINQ(g),OGATE,XQ(H)::R(J),XQ(g)
        • Q(g);::QAR2(H),XQ(g)
      • Refutation
        • S(j);XS(L)
    • Try
      • R(J);CHECK,XP(i)
      • Vars
        • S(j);XR(J)::QAR1(H),XQ(g)
      • Refutation
        • K(f);N_SPINQ(g),P-FLIGHT,XR(J)
    • Try
      • P(G);N_SPINQ(H),XQ(g)
      • Threat
        • DUALS(6)
      • Refutation
        • P(c);P_SPINP(c),XB(E)
  • Actual
    • B(E);N_PINQ(g),N_SPINQ(H)
    • Threat
      • R(A)+P(G),XQ(g)
    • Vars
      • Q(g);OGATEB,P_SPINQ(g),XP(G)::QAR(H)+B(E)
      • Q(g);OGATE,P_PINQ(H),P_SPINQ(g),XB(E)::QAR2(H),XQ(g)
      • Q(g);N_GUARD::QAB(H)
      • Q(g);N_GUARD,P_PINR(J)::QAB(H)
      • Q(g);SBLOCK::QAR(H)+B(E),DCHECK
      • Q(g);N_GUARD::R(A)+P(G),XR(e)
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