MESON Chess Problem Database

Problem Display
PID: 177866 (2Q5/8/1nN3p1/8/1p3p2/1B1k4/5K2/2R5 w - - 0 1)

Veselenchuk, Semen Ivanovich

Sahs (Latvia), 1990

2Q5/8/1nN3p1/8/1p3p2/1B1k4/5K2/2R5

#2

5 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rd1+?
      • 1...Ke4
        • 2.Bc2#
        • 2.Rd4#
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qh3+?
      • 1...Kd2
        • 2.Rd1#
      • 1...Ke4
        • 2.Re1#
      • 1...f3!
    • 1.Qf5+?
      • 1...Kd2
        • 2.Qc2#
      • 1...gxf5!
    • 1.Qe6?
      • threat
        • 2.Qe2#
      • 1...f3
        • 2.Qe3#
      • 1...Kd2!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Bc2#
        • 2.Re1#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sxd7!
    • 1.Qd8+?
      • 1...Ke4
        • 2.Bc2#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7!
    • 1.Qe8?
      • threat
        • 2.Qe2#
      • 1...f3
        • 2.Qe3#
      • 1...Kd2!
    • 1.Qh8?
      • threat
        • 2.Qd4#
      • 1...Kd2
        • 2.Rd1#
      • 1...Ke4!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe2#
      • 1...Kd2
        • 2.Qd1#
      • 1...Ke4
        • 2.Qxg6#
      • 1...f3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(A)
        • K(a);S_FLIGHT::R(A)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • P(e);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(c);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR2(E),XS(d)
      • Refutation
        • S(d);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(C)
        • S(d);N_GUARD,P_SPINS(d)::QAR2(E),XS(d)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(c);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);P_SPINP(c),S_FLIGHT::QAB(E),XP(e)
      • P(c);OGATE::QAR1(E)
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