MESON Chess Problem Database

Problem Display
PID: 96610 (2R5/4p3/2PkP3/1P1q1P2/2B1P3/N2P2N1/1Q6/6BK w - - 0 1)

Neyndorff, Luke

US Problem Bulletin, 1992

2R5/4p3/2PkP3/1P1q1P2/2B1P3/N2P2N1/1Q6/6BK

#2

13 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Sxc4#
    • 1...Qxe4+
      • 2.Sxe4#
    • 1...Qxc6
      • 2.Rxc6#
    • 1...Qxd3
      • 2.e5#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qxb5
      • 2.Sxb5#
    • 1...Qxf5
      • 2.Sxf5#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Rd8#
      • 1...Qxe4+
        • 2.Sxe4#
      • 1...Qxc6
        • 2.Rxc6#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qxe6!
    • 1.Qb4+?
      • 1...Qc5
        • 2.Qxc5#
      • 1...Ke5!
  • Keys
    • 1.d4!
      • 1...Qxe4+
        • 2.Sxe4#
      • 1...Qxc4
        • 2.Sxc4#
      • 1...Qxc6
        • 2.Rxc6#
      • 1...Qxe6
        • 2.Qb4#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Qxf5
        • 2.Sxf5#
      • 1...Qc5
        • 2.dxc5#
      • 1...Qe5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_PINP(H),XB(G)::S(D),XQ(a)
    • Q(a);CHECK,XP(H)::S(F),XQ(a)
    • Q(a);OGATE,XP(K)::R1(M),XQ(a)
    • Q(a);N_PINP(H),XP(E)::P(H)
    • Q(a);N_PINP(H),OGATEB::QAR2(C),XQ(a)
    • Q(a);N_PINP(H),XP(I)::S(D),XQ(a)
    • Q(a);N_PINP(H),XP(J)::S(F),XQ(a)
  • Tries
    • Try
      • B(A);
      • Threat
        • R(M)
      • Vars
        • Q(a);CHECK,XP(H)::S(F),XQ(a)
        • Q(a);OGATE,XP(K)::R1(M),XQ(a)
        • Q(a);N_PINP(H),XP(I)::S(D),XQ(a)
        • Q(a);N_PINP(H),OGATEB::QAR2(C),XQ(a)
      • Refutation
        • Q(a);N_PINP(H),XP(L)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);N_GUARD,N_PINP(H),P_SPINQ(a)::QAB1(C),XQ(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(E);
    • Vars
      • Q(a);CHECK,XP(H)::S(F),XQ(a)
      • Q(a);N_PINP(H),XB(G)::S(D),XQ(a)
      • Q(a);OGATE,XP(K)::R1(M),XQ(a)
      • Q(a);N_GUARD,N_PINP(H),XP(L)::QAB(C)
      • Q(a);N_PINP(H),OGATE,XP(E)::QAR2(C),XQ(a)
      • Q(a);N_PINP(H),XP(I)::S(D),XQ(a)
      • Q(a);N_PINP(H),XP(J)::S(F),XQ(a)
      • Q(a);N_PINP(H),OGATE::P(E),XQ(a)
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