MESON Chess Problem Database

Problem Display
PID: 181816 (6K1/2b5/8/3pN3/4p2p/5N1k/2Q3pP/5bR1 w - - 0 1)

Maksimov, Nikolai Ivanovich

Revue d'Echecs, 1905

6K1/2b5/8/3pN3/4p2p/5N1k/2Q3pP/5bR1

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Qxg2#
    • 1...Bc4
      • 2.Qxg2#
    • 1...Bb5
      • 2.Qxg2#
    • 1...Ba6
      • 2.Qxg2#
    • 1...Ba5
      • 2.Qc8#
    • 1...Bxe5
      • 2.Qc8#
    • 1...Bb6
      • 2.Qc8#
    • 1...Bd6
      • 2.Qc8#
    • 1...Bb8
      • 2.Qc8#
    • 1...Bd8
      • 2.Qc8#
    • 1...e3
      • 2.Qf5#
  • Tries
    • 1.Qxe4?
      • threat
        • 2.Qf5#
        • 2.Qg4#
        • 2.Qxh4#
      • 1...Bxe5
        • 2.Qf5#
        • 2.Qxh4#
      • 1...Bd3
        • 2.Qg4#
        • 2.Qxh4#
      • 1...Bd8
        • 2.Qf5#
        • 2.Qg4#
      • 1...dxe4!
    • 1.Qc6?
      • threat
        • 2.Qd7#
        • 2.Qe6#
      • 1...Bb5
        • 2.Qe6#
      • 1...Bd6
        • 2.Qd7#
        • 2.Qc8#
      • 1...exf3!
  • Keys
    • 1.Rh1!
      • threat
        • 2.Sg1#
        • 2.Sg5#
      • 1...g1Q+
        • 2.Sxg1#
      • 1...g1R+
        • 2.Sxg1#
      • 1...Bxe5
        • 2.Qc8#
      • 1...gxh1Q
        • 2.Sg5#
      • 1...gxh1R
        • 2.Sg5#
      • 1...exf3
        • 2.Qf5#
      • 1...g1S
        • 2.Sxg1#
        • 2.Sg5#
      • 1...g1B
        • 2.Sxg1#
        • 2.Sg5#
      • 1...Bb6
        • 2.Sg5#
        • 2.Qc8#
      • 1...Bd8
        • 2.Sg1#
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • B(a);N_GUARD::QAB1(B),XP(b)
    • B(g);OGATE,SBLOCK::QAB(B)
    • B(g);OGATE,XS(E)::QAB(B)
    • B(g);OGATE::QAB(B)
    • P(d);OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);XP(d)
      • Threat
        • DUALS(3)
      • Refutation
        • P(f);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(B)
      • Refutation
        • P(d);XS(D)
  • Actual
    • R(A);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);CHECK::S(D),XQ(b)
      • P(b);CHECK::S(D),XR(b)
      • B(g);OGATE,XS(E)::QAB(B)
      • P(b);XR(A)::S(D)
      • P(d);OGATE,XS(D)::QAB(B)
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