MESON Chess Problem Database

Problem Display
PID: 179861 (BB3rb1/4bR2/3q1p1p/3Q4/5k2/8/5P1N/3K3R w - - 0 1)

Boyer, Jean-Pierre

3rd HM., Busmen's Chess Review, 1968-1969

BB3rb1/4bR2/3q1p1p/3Q4/5k2/8/5P1N/3K3R

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Bd8
      • 2.Bxd6#
  • Tries
    • 1.Re1?
      • threat
        • 2.Re4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...f5
        • 2.Qd2#
      • 1...Bh7!
    • 1.Rg1?
      • threat
        • 2.Rg4#
      • 1...Qe5
        • 2.Qf3#
        • 2.Qe4#
        • 2.Qxe5#
      • 1...h5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rh4#
      • 1...Kg4
        • 2.Rh4#
      • 1...Qe5
        • 2.Qe4#
      • 1...f5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_PINQ(E)::QAB1(E),XQ(b)
    • B(e);N_GUARD::B(H),XQ(b)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • Q(b);N_PINQ(E)::QAB1(E),XQ(b)
        • P(c);::QAB(E)
      • Refutation
        • B(g);
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Refutation
        • P(d);
  • Actual
    • S(D);
    • Threat
      • R(B)
    • Vars
      • K(a);N_SPINP(c),N_SPINQ(b),P-FLIGHT::R1(B)
      • Q(b);N_PINQ(E)::QAR1(E)
      • P(c);::QAR2(E)
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