MESON Chess Problem Database

Problem Display
PID: 86861 (2n1R3/8/B4Q2/3p4/r1q1P2p/1Nn1k2K/4N3/2bR4 w - - 0 1)

Davidenko, Fedor Vasilevich

Hlas l'udu, 1979

2n1R3/8/B4Q2/3p4/r1q1P2p/1Nn1k2K/4N3/2bR4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Qf4#
    • 1...Qb4
      • 2.Qf4#
    • 1...Qd4
      • 2.Qf4#
    • 1...Qxe4
      • 2.Qf4#
    • 1...Qc5
      • 2.Qf4#
    • 1...Qc6
      • 2.Qf4#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qf3#
      • 1...Qxe4+
        • 2.Qf4#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Qxe2+!
    • 1.Rf1?
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Qxe2
        • 2.Qg5#
        • 2.Qf4#
        • 2.Qh6#
      • 1...Qxb3
        • 2.Qg5#
        • 2.Qf4#
        • 2.Qh6#
      • 1...Kd3!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Qxe2
        • 2.Qf4#
      • 1...Qxe4
        • 2.Qf2#
      • 1...dxe4
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(e);XS(C)::QAB1(G)
    • Q(e);::QAB1(G)
    • Q(e);P_SPINQ(e),XP(E)::QAB1(G)
  • Tries
    • Try
      • K(D);P_SPINP(E),S_FLIGHT
      • Threat
        • QAR1(G)
      • Vars
        • Q(e);CHECK,P_SPINQ(e),XP(E)::QAB1(G)
        • K(c);P-FLIGHT,P_SPINQ(e),XS(B)::QAB1(G)
      • Refutation
        • Q(e);CHECK,XS(B)
    • Try
      • R(A);
      • Threat
        • QAR1(G)
      • Vars
        • K(c);P-FLIGHT,P_SPINQ(e),XS(B)::QAB1(G)
      • Refutation
        • K(c);P-FLIGHT,P_SPINQ(e)
  • Actual
    • R(H);
    • Threat
      • QAR1(G)
    • Vars
      • K(c);P-FLIGHT,P_SPINQ(e),XS(B)::QAB1(G)
      • K(c);OGATEB,P-FLIGHT,XP(E)::QAR2(G)
      • Q(e);XS(B)::QAB1(G)
      • Q(e);SBLOCK,XP(E)::QAB1(G)
      • P(g);SBLOCK,XP(E)::QAB1(G)
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