MESON Chess Problem Database

Problem Display
PID: 129711 (4K3/4N2p/5k1b/6p1/3P2p1/8/6n1/3Q4 w - - 0 1)

Bobrov, Pavel Pavlovich

La Strategie, 1908

4K3/4N2p/5k1b/6p1/3P2p1/8/6n1/3Q4

#2

4 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe5#
      • 1...Kg7
        • 2.Qe5#
      • 1...Se3!
    • 1.Qf1+?
      • 1...Ke6
        • 2.Qa6#
      • 1...Kg7
        • 2.Qf8#
      • 1...Sf4!
    • 1.d5?
      • threat
        • 2.Qa1#
        • 2.Qd4#
      • 1...Kg7
        • 2.Qa1#
        • 2.Qd4#
      • 1...Ke5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.d5#
      • 1...Ke6
        • 2.Qa6#
      • 1...Kg7
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);S_FLIGHT::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR(A)
        • K(d);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(d);P-FLIGHT::QAR(A)
      • K(d);S_FLIGHT::QAB(A)+P(B)
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