MESON Chess Problem Database

Problem Display
PID: 94795 (Kb1B3Q/2p1q3/4p3/5R1P/B2P4/4N3/4p1R1/1N2k2b w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1939

Kb1B3Q/2p1q3/4p3/5R1P/B2P4/4N3/4p1R1/1N2k2b

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Bh4#
    • 1...Qb4
      • 2.Bh4#
    • 1...Qh4
      • 2.Bxh4#
    • 1...Qc5
      • 2.Bh4#
    • 1...Qf8
      • 2.Bh4#
    • 1...Qd7
      • 2.Bh4#
    • 1...Qf7
      • 2.Bh4#
    • 1...Qh7
      • 2.Bh4#
    • 1...Qe8
      • 2.Bh4#
    • 1...Bxg2+
      • 2.Sxg2#
    • 1...c5
      • 2.Ba5#
    • 1...c6
      • 2.Rg1#
  • Tries
    • 1.Bxe7?
      • threat
        • 2.Bb4#
        • 2.Bh4#
      • 1...Bxg2+
        • 2.Sxg2#
      • 1...c6
        • 2.Bb4#
        • 2.Rg1#
      • 1...c5!
    • 1.Rc5?
      • threat
        • 2.Rc1#
      • 1...Qxc5
        • 2.Bh4#
      • 1...Bxg2+!
    • 1.d5?
      • threat
        • 2.Rg1#
        • 2.Qc3#
      • 1...Bxg2
        • 2.Sxg2#
        • 2.Qc3#
      • 1...exf5
        • 2.Qc3#
      • 1...Qg5
        • 2.Qc3#
      • 1...Qa3
        • 2.Bh4#
        • 2.Rg1#
      • 1...Qb4
        • 2.Rg1#
      • 1...Qc5
        • 2.Bh4#
        • 2.Rg1#
      • 1...Qf6
        • 2.Rg1#
      • 1...e5
        • 2.Rg1#
      • 1...Qg7!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qg3#
      • 1...Bxg2+
        • 2.Sxg2#
      • 1...Qg5
        • 2.Qa5#
      • 1...Qh4
        • 2.Bxh4#
        • 2.Qa5#
      • 1...Qd6
        • 2.Bh4#
      • 1...Qg7
        • 2.Qa5#
      • 1...c5
        • 2.Ba5#
      • 1...c6
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(f);OGATE,P_PINB(D)::B(I)
    • Q(f);OGATE::B(I)
    • Q(f);OGATE::B(I),XQ(f)
    • B(b);CHECK,XR(B)::S(C),XB(b)
    • P(e);OGATE::B(I)
    • P(e);N_PINR(B)::R(B)
  • Tries
    • Try
      • B(I);XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);CHECK,XR(B)::S(C),XB(b)
      • Refutation
        • P(e);
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • Q(f);OGATE,XR(F)::B(I)
      • Refutation
        • B(b);CHECK,XR(B)
    • Try
      • P(E);N_SPINR(B)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);XR(F)::QAB(J)
        • Q(f);::QAB(J)
        • Q(f);::R(B)
        • P(d);::R(B)
      • Refutation
        • Q(f);
  • Actual
    • Q(J);
    • Threat
      • QAB(J)
    • Vars
      • B(b);CHECK,XR(B)::S(C),XB(b)
      • Q(f);N_GUARD::QAB(J)
      • Q(f);OGATE::B(I)
      • P(e);OGATE::B(I)
      • P(e);N_PINR(B)::R(B)
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