MESON Chess Problem Database

Problem Display
PID: 250916 (b3n3/4N3/3p1p1n/1Qp2B2/4pk1P/8/1N3BPP/K7 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

3rd Prize, Schach, 1993

b3n3/4N3/3p1p1n/1Qp2B2/4pk1P/8/1N3BPP/K7

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Sd3#
      • 2.Bg3#
    • 1...c4
      • 2.Sg6#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Be3#
        • 2.Bg3#
      • 1...Sg4
        • 2.Bg3#
      • 1...e3
        • 2.Bxe3#
        • 2.Bg3#
      • 1...Sxf5!
    • 1.Be3+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Kxe3!
    • 1.Qd3?
      • threat
        • 2.Bg3#
        • 2.Qg3#
      • 1...Ke5
        • 2.Bg3#
        • 2.Qg3#
      • 1...exd3
        • 2.Sxd3#
      • 1...e3
        • 2.Sg6#
        • 2.Bg3#
        • 2.Qxe3#
      • 1...Sxf5!
    • 1.Qc4?
      • threat
        • 2.Sd3#
      • 1...Ke5
        • 2.Bg3#
      • 1...Sxf5!
    • 1.Qd7?
      • threat
        • 2.Sg6#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Ke5!
    • 1.Qb3?
      • threat
        • 2.Bg3#
        • 2.Qg3#
      • 1...Ke5
        • 2.Qg3#
      • 1...e3
        • 2.Sd3#
        • 2.Bg3#
        • 2.Qxe3#
      • 1...Sxf5!
    • 1.Qxc5?
      • threat
        • 2.Sg6#
        • 2.Be3#
        • 2.Bg3#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Bd5
        • 2.Bg3#
      • 1...d5
        • 2.Bg3#
      • 1...Sg4
        • 2.Sg6#
        • 2.Bg3#
      • 1...e3
        • 2.Sd3#
        • 2.Sg6#
        • 2.Bxe3#
        • 2.Bg3#
        • 2.Qxe3#
      • 1...dxc5!
    • 1.g3+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Kf3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Bg3#
      • 1...Ke5
        • 2.Sd3#
      • 1...Sxf5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);::S(I)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::B(C)
      • Refutation
        • S(f);XB(H)
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::S(B)
      • Refutation
        • K(b);S_FLIGHT,XB(C)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);XQ(G)::S(B),XP(a)
      • Refutation
        • S(f);XB(H)
    • Try
      • Q(G);P_PINP(a)
      • Threat
        • S(B)
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::B(C)
      • Refutation
        • S(f);XB(H)
    • Try
      • Q(G);
      • Threat
        • S(I)
      • Vars
        • S(f);OGATE,XB(H)::QAR1(G),XS(f)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAB(G)
      • Refutation
        • S(f);XB(H)
    • Try
      • Q(G);XP(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(f);OGATE,XB(H)::QAR1(G),XS(f)
        • B(g);::B(C)
        • P(d);::B(C)
      • Refutation
        • P(d);XQ(G)
    • Try
      • P(D);CHECK
      • Vars
        • K(b);N_GUARD,P_SPINP(c),S_FLIGHT::S(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • B(C)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::S(B)
      • S(f);SBLOCK,XB(H)::S(I)
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