MESON Chess Problem Database

Problem Display
PID: 230350 (4NQ1B/r2p4/2q5/3kP1p1/1P1N2R1/1P3n1B/4P3/4n2K w - - 0 1)

Bantysh, Nikolai Ivanovich

Zadachi i Etyudi, 2001

4NQ1B/r2p4/2q5/3kP1p1/1P1N2R1/1P3n1B/4P3/4n2K

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qc5#
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qb5
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qb7
      • 2.Qc5#
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qa8
      • 2.Qc5#
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc1
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc2
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc3
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc4
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc5
      • 2.Qxc5#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qa6
      • 2.Qc5#
    • 1...Qd6
      • 2.Qxd6#
    • 1...Qe6
      • 2.Qc5#
    • 1...Qf6
      • 2.Qc5#
    • 1...Qg6
      • 2.Qc5#
    • 1...Qh6
      • 2.Qc5#
    • 1...Qc7
      • 2.Qf7#
      • 2.Qg8#
    • 1...Qc8
      • 2.Qd6#
      • 2.Qf7#
      • 2.Qg8#
    • 1...Sc2
      • 2.Qxf3#
    • 1...Sg2
      • 2.Qxf3#
    • 1...Sd3
      • 2.Qxf3#
  • Tries
    • 1.Sf6+?
      • 1...Qxf6
        • 2.Qc5#
      • 1...Kxe5!
    • 1.Sc7+?
      • 1...Qxc7
        • 2.Qf7#
        • 2.Qg8#
      • 1...Rxc7!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...Sxd4
        • 2.e4#
      • 1...Qc2
        • 2.Sf6#
        • 2.Qf7#
      • 1...Sd2
        • 2.e6#
      • 1...Qg6!
  • Keys
    • 1.e6!
      • threat
        • 2.e4#
      • 1...Qxe6
        • 2.Qc5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Qc2
        • 2.Qd6#
      • 1...Sd2
        • 2.Qf5#
      • 1...Se5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(e);N_GUARD::QAR1(J)
    • Q(e);N_GUARD::QAR1(J),XQ(e)
    • Q(e);N_GUARD,P_PINB(D)::QAR1(J)
    • S(a);N_GUARD::QAB(J),XS(b)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • Q(e);XS(I)::QAR1(J)
      • Refutation
        • K(c);P-FLIGHT,XP(H)
    • Try
      • S(I);CHECK
      • Refutation
        • R(f);XS(I)
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • S(b);SBLOCK,XS(F)::P(B)
        • S(b);N_GUARD::QAR(J)+P(H)
      • Refutation
        • Q(e);
  • Actual
    • P(H);
    • Threat
      • P(B)
    • Vars
      • Q(e);N_GUARD,XP(H)::QAR1(J)
      • S(b);OGATE,XS(F)::R1(G),XS(b)
      • Q(e);N_GUARD::QAR1(J)
      • S(b);N_GUARD::QAR2(J)
      • S(b);SBLOCK::S(I)
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