MESON Chess Problem Database

Problem Display
PID: 225459 (2nr1B2/P2p1p2/1R1q1p2/1PPk1pP1/8/p2KQN1p/6B1/8 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Praca, 1994

2nr1B2/P2p1p2/1R1q1p2/1PPk1pP1/8/p2KQN1p/6B1/8

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qd4#
      • 2.a8Q#
      • 2.a8B#
    • 1...Qg3
      • 2.Qd4#
      • 2.a8Q#
      • 2.a8B#
    • 1...Qf4
      • 2.a8Q#
      • 2.a8B#
    • 1...Qxc5
      • 2.Qxc5#
    • 1...Qe5
      • 2.a8Q#
      • 2.a8B#
    • 1...Qc7
      • 2.Qd4#
    • 1...Qe7
      • 2.Qd4#
      • 2.a8Q#
      • 2.a8B#
    • 1...Qb8
      • 2.Qd4#
    • 1...Qxf8
      • 2.Qd4#
      • 2.a8Q#
      • 2.a8B#
    • 1...Qe6
      • 2.Qd4#
    • 1...Sxa7
      • 2.Rxd6#
    • 1...Se7
      • 2.Rxd6#
    • 1...h2
      • 2.Se1#
      • 2.Sg1#
      • 2.Sd2#
      • 2.Sxh2#
      • 2.Sh4#
  • Tries
    • 1.Qe4+?
      • 1...Kxc5+
        • 2.Qd4#
      • 1...fxe4+!
    • 1.Qe5+?
      • 1...Qxe5
        • 2.a8Q#
        • 2.a8B#
      • 1...fxe5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qc4#
      • 1...Kxc5+
        • 2.Qd4#
      • 1...Ke6+
        • 2.Sd4#
      • 1...Qxf4
        • 2.a8Q#
        • 2.a8B#
      • 1...Qxc5
        • 2.Qxf5#
      • 1...Sxb6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD::P=Q
    • Q(e);OGATE,XP(F)::QAR1(C),XQ(e)
    • Q(e);::QAR1(C)
    • S(i);N_GUARD,XP(I)::R1(H),XQ(e)
    • S(i);N_GUARD::R1(H),XQ(e)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);CHECK,P-FLIGHT,P_SPINQ(e),XP(F)::QAB1(C)
      • Refutation
        • P(d);CHECK,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(e);XQ(C)::P=Q
      • Refutation
        • P(f);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);CHECK,P-FLIGHT,P_SPINQ(e),XP(F)::QAB1(C)
      • K(c);CHECK,P_SPINQ(e),S_FLIGHT::S(D)
      • Q(e);N_GUARD,XQ(C)::P=Q
      • Q(e);N_GUARD,XP(F)::QAR2(C),XP(d)
      • S(i);N_GUARD,XR(H)::QAR1(C),XQ(e)
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