MESON Chess Problem Database

Problem Display
PID: 70877 (2nR4/1N2k3/5b2/8/3pp3/1B6/5Q2/4K3 w - - 0 1)

Popov, Grigory Leontievich

Il Due Mosse, 1961

2nR4/1N2k3/5b2/8/3pp3/1B6/5Q2/4K3

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Qxh4#
    • 1...Be5
      • 2.Qf7#
      • 2.Qf8#
    • 1...Bg5
      • 2.Qf7#
      • 2.Qf8#
    • 1...Bg7
      • 2.Qf7#
    • 1...Bh8
      • 2.Qf7#
      • 2.Qf8#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qc7#
      • 1...Bh4
        • 2.Qxh4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bg5
        • 2.Qe5#
        • 2.Qxg5#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bh8!
    • 1.Qf5?
      • threat
        • 2.Qe6#
        • 2.Qd7#
      • 1...Sb6
        • 2.Qe6#
        • 2.Qc5#
      • 1...Be5
        • 2.Qe6#
        • 2.Qxe5#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Bg5
        • 2.Qe6#
        • 2.Qe5#
        • 2.Qxg5#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Bg7
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bh8
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Bh4+!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qc7#
      • 1...Bh4+
        • 2.Qxh4#
      • 1...Sb6
        • 2.Qd6#
      • 1...Be5
        • 2.Qxe5#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Bg5
        • 2.Qe5#
        • 2.Qxg5#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Bg7
        • 2.Qf7#
      • 1...Bh8
        • 2.Qf7#
        • 2.Qf8#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATEB,P_PINQ(B)::QAB(B),XB(c)
    • B(c);OGATE::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • B(c);OGATEB,P_PINQ(B)::QAB(B),XB(c)
        • B(c);N_GUARD::QAR2(B),XB(c)
        • S(e);N_GUARD::QAB1(B)
        • S(e);N_GUARD::QAB1(B),XS(e)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • B(c);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • B(c);CHECK,OGATEB::QAB(B),XB(c)
      • S(e);N_GUARD::QAB1(B)
      • B(c);OGATE::QAR1(B)
      • S(e);N_GUARD::QAB1(B),XS(e)
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