MESON Chess Problem Database

Problem Display
PID: 158056 (1N2n3/2p5/6pK/1n2k3/1PB1P3/2r3N1/5Q2/B7 w - - 0 1)

Antonov, Yuri Mikhailovich

Sahs, 1976

1N2n3/2p5/6pK/1n2k3/1PB1P3/2r3N1/5Q2/B7

#2

8 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc5#
    • 1...Sbd6
      • 2.Sc6#
      • 2.Sd7#
      • 2.Bxc3#
    • 1...Sed6
      • 2.Sc6#
      • 2.Sd7#
  • Tries
    • 1.Se2?
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kd6
        • 2.Qc5#
      • 1...g5!
    • 1.Qc5+?
      • 1...Kf6
        • 2.Sd7#
        • 2.Qg5#
        • 2.e5#
      • 1...Kf4!
    • 1.Qd2?
      • threat
        • 2.Sd7#
      • 1...Kf6
        • 2.Qg5#
      • 1...Sf6
        • 2.Sc6#
      • 1...Sd4!
    • 1.Qf4+?
      • 1...Kd4
        • 2.e5#
      • 1...Kxf4!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Qe6#
        • 2.Qc5#
      • 1...gxf5!
    • 1.Qf8?
      • threat
        • 2.Sc6#
      • 1...Kd4
        • 2.Qc5#
      • 1...Sd4
        • 2.Sd7#
      • 1...Sa7
        • 2.Bxc3#
      • 1...c6
        • 2.Sxc6#
      • 1...Sf6!
  • Keys
    • 1.Kg5!
      • threat
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sf6
        • 2.Qxf6#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINR(a),S_FLIGHT::QAB1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT,XP(F)::QAR1(B)
        • K(c);N_SPINR(a),S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • S(H)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • S(f);SBLOCK::S(H)
      • Refutation
        • S(b);N_SPINR(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR(B)+P(F)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);
      • Threat
        • S(H)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • S(b);N_SPINR(a),SBLOCK::S(H)
        • S(b);N_GUARD::B(A),XR(a)
        • P(e);::S(H),XP(e)
      • Refutation
        • S(f);
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • K(c);N_SPINR(a),S_FLIGHT::QAB1(B)
      • S(b);N_SPINR(a),SBLOCK::QAB1(B)
      • S(f);N_GUARD::QAB1(B),XS(f)
      • P(e);::QAR2(B),XP(e)
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