MESON Chess Problem Database

Problem Display
PID: 18335 (8/2Q2p2/R2q1P1n/5k1P/3B1N1K/1b4P1/4N3/7B w - - 0 1)

Barnes, Barry Peter

Chess, 1955

8/2Q2p2/R2q1P1n/5k1P/3B1N1K/1b4P1/4N3/7B

#2

10 + 5

4054 Complete Mansfield/III 1999
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Qe5#
    • 1...Qb4
      • 2.Qe5#
    • 1...Qxf4+
      • 2.Qxf4#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Qxd4
      • 2.Sxd4#
    • 1...Qxa6
      • 2.Qe5#
    • 1...Qb6
      • 2.Qe5#
    • 1...Qc6
      • 2.Qe5#
    • 1...Qxf6+
      • 2.Rxf6#
    • 1...Qd7
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Qxc2#
    • 1...Be6
      • 2.Qc2#
    • 1...Sg8
      • 2.g4#
  • Tries
    • 1.Ra5+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qd5
        • 2.Qd7#
        • 2.Qc8#
      • 1...Bd5
        • 2.Qc2#
      • 1...Qc5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg7#
      • 1...Qxg3+
        • 2.Sxg3#
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Qxd4+
        • 2.S6xd4#
      • 1...Kxe6
        • 2.Qc8#
      • 1...Qxe6
        • 2.Qf4#
      • 1...Bxe6
        • 2.Qc2#
      • 1...fxe6
        • 2.Qh7#
      • 1...Qf8
        • 2.Qf4#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 13
  • Sets
    • Q(c);OGATE::QAR1(J)
    • Q(c);CHECK,OGATE,XS(E)::QAR1(J),XQ(c)
    • Q(c);OGATE::QAR1(J),XQ(c)
    • Q(c);P_PINS(E),XB(D)::S(B),XQ(c)
    • Q(c);OGATE,XR(H)::QAR1(J)
    • Q(c);CHECK,OGATE,XP(I)::R1(H),XQ(c)
    • Q(c);OGATE,P_PINP(I)::QAR1(J)
    • B(a);N_GUARD::QAB(J)
    • B(a);N_GUARD::QAB(J),XB(a)
    • S(d);N_GUARD::P(C)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • Q(c);OGATE,P_SPINQ(c)::QAR1(J),XQ(c)
        • B(a);P_SPINB(a)::QAB(J)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(c);CHECK,XP(C)::S(B),XQ(c)
      • Q(c);CHECK,OGATE::QAR1(J),XQ(c)
      • Q(c);CHECK,XB(D)::S(E),XQ(c)
      • K(b);OGATEB,P_SPINQ(c),S_FLIGHT,XS(E)::QAB(J)
      • Q(c);OGATE,XS(E)::QAR1(J)
      • B(a);N_GUARD,SBLOCK,XS(E)::QAB(J)
      • P(e);OGATE,SBLOCK,XS(E)::QAB(J)
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