MESON Chess Problem Database

Problem Display
PID: 187047 (3K4/8/3kppR1/3Pb3/N2pP3/6n1/1N4Q1/5b2 w - - 0 1)

Koci, Vladimir

The Problemist Supplement, 2018

3K4/8/3kppR1/3Pb3/N2pP3/6n1/1N4Q1/5b2

#2

7 + 7

4901 Best Problems 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Se2
      • 2.Sc4#
    • 1...d3
      • 2.Sc4#
    • 1...f5
      • 2.Rxe6#
  • Tries
    • 1.Qxf1?
      • threat
        • 2.Sc4#
        • 2.Qa6#
      • 1...Sxf1
        • 2.Sc4#
      • 1...exd5
        • 2.Qa6#
      • 1...Bf4
        • 2.Sc4#
      • 1...Se2
        • 2.Sc4#
      • 1...d3
        • 2.Sc4#
      • 1...Sxe4!
    • 1.Qc2?
      • threat
        • 2.Qc5#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Sxe4
        • 2.Qc6#
      • 1...Bf4
        • 2.Qc7#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Bb5
        • 2.Qc5#
        • 2.Qc7#
      • 1...exd5!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qxe6#
      • 1...Bxh3
        • 2.Sc4#
      • 1...exd5
        • 2.Qd7#
      • 1...Sf5
        • 2.Qa3#
      • 1...f5
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD,XQ(B)::S(A)
    • B(a);N_GUARD::S(A),XB(a)
    • S(b);S_CUTB(a)::S(A)
    • P(c);S_CUTB(a)::S(A)
    • P(g);OGATE,P_SPINP(f)::R1(F),XP(f)
  • Tries
    • Try
      • Q(B);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XQ(B)::S(A)
        • P(f);P_SPINP(g),XP(E)::QAR(B)
        • B(d);::S(A)
        • S(b);::S(A)
        • P(c);::S(A)
      • Refutation
        • S(b);XP(D)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);XP(D)::QAR1(B)
        • B(d);::QAB1(B)
        • B(a);N_GUARD::S(A),XB(a)
      • Refutation
        • P(f);P_SPINP(g),XP(E)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(f)
    • Vars
      • B(a);N_GUARD,XQ(B)::S(A)
      • P(f);OGATE,P_SPINP(g),XP(E)::QAR1(B)
      • S(b);OGATE::QAB(B)
      • P(g);OGATE,P_SPINP(f)::R1(F),XP(f)
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