MESON Chess Problem Database

Problem Display
PID: 268686 (3Q4/4NK2/3b1p2/2pN2BR/1ppkp3/2p5/2n1p3/1B6 w - - 0 1)

Slesarenko, Anatoly Vasilevich

3rd Prize, Feoktistov-70 JT, 2018

3Q4/4NK2/3b1p2/2pN2BR/1ppkp3/2p5/2n1p3/1B6

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bxf6#
    • 1...Sa1
      • 2.Be3#
    • 1...Se1
      • 2.Be3#
    • 1...Sa3
      • 2.Be3#
    • 1...Se3
      • 2.Bxe3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qxd6#
      • 1...Kd3
        • 2.Qxd6#
      • 1...Ke5
        • 2.Sc6#
      • 1...Sxe3
        • 2.Bxf6#
      • 1...fxg5!
    • 1.Be3+?
      • 1...Sxe3
        • 2.Sc6#
      • 1...Kd3!
    • 1.Qxd6?
      • threat
        • 2.Se3#
        • 2.Sxb4#
        • 2.Sb6#
        • 2.Sxf6#
        • 2.Sc7#
      • 1...Kd3
        • 2.Se3#
        • 2.Sxb4#
        • 2.Sb6#
        • 2.Sxf6#
        • 2.Sc7#
      • 1...e3
        • 2.Sxf6#
      • 1...Se3
        • 2.Sxe3#
        • 2.Sc6#
        • 2.Bxe3#
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...b3
        • 2.Se3#
        • 2.Sb4#
        • 2.Sb6#
        • 2.Sxf6#
        • 2.Sc7#
      • 1...f5
        • 2.Se3#
        • 2.Sxb4#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sc7#
      • 1...fxg5!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Qxd6#
      • 1...Kd3
        • 2.Qxd6#
      • 1...Ke5
        • 2.Be3#
      • 1...Se3
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(f);N_GUARD,S_FLIGHT::R(D)+B(C),DCHECK,XP(j)
    • S(a);N_GUARD::B(C)
    • S(a);N_GUARD::B(C),XS(a)
  • Tries
    • Try
      • S(B);P_PINB(i)
      • Threat
        • QAR2(G),XB(i)
      • Vars
        • K(f);P-FLIGHT,P_SPINS(a)::QAR(G),XB(i)
        • K(f);N_GUARD,N_SPINB(i),S_FLIGHT::S(E)
        • S(a);SBLOCK,XS(B)::B(C),XP(j)
      • Refutation
        • P(j);XB(C)
    • Try
      • B(C);CHECK
      • Vars
        • S(a);XB(C)::S(E)
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(a)
    • Try
      • Q(G);XB(i)
      • Threat
        • DUALS(5)
      • Vars
        • P(g);::QAR(G)+S(B),XP(j)
      • Refutation
        • P(j);XB(C)
  • Actual
    • S(B);P_PINB(i),XP(j)
    • Threat
      • QAR2(G),XB(i)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(a)::QAR(G),XB(i)
      • K(f);N_GUARD,N_SPINB(i),S_CUTS(a),S_FLIGHT::R(D)+B(C)
      • S(a);::S(E)
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