MESON Chess Problem Database

Problem Display
PID: 180081 (3Nr1r1/5P2/K2PNk1P/R4p1P/3p1n1P/3p3p/3Q1q1B/8 w - - 0 1)

Bukne, Roald

Sjakk-Liv, 1946

3Nr1r1/5P2/K2PNk1P/R4p1P/3p1n1P/3p3p/3Q1q1B/8

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6
      • 2.fxg8S#
    • 1...Re7
      • 2.fxg8S#
    • 1...Rg1
      • 2.fxe8S#
    • 1...Rg2
      • 2.fxe8S#
    • 1...Rg3
      • 2.fxe8S#
    • 1...Rg4
      • 2.fxe8S#
    • 1...Rg5
      • 2.hxg5#
      • 2.fxe8S#
    • 1...Rg6
      • 2.fxe8S#
    • 1...Rg7
      • 2.fxe8S#
    • 1...Se2
      • 2.Be5#
    • 1...Sg2
      • 2.Be5#
    • 1...Sxe6
      • 2.Be5#
    • 1...Sg6
      • 2.Qg5#
  • Tries
    • 1.Qxf2?
      • threat
        • 2.Qxd4#
      • 1...Rxe6
        • 2.fxg8S#
      • 1...Sxh5
        • 2.Qxf5#
      • 1...Sxe6
        • 2.Be5#
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Se2
        • 2.Be5#
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Sg6
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Rxd8!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Rxf5#
      • 1...Rxg7
        • 2.fxe8S#
      • 1...Sxh5
        • 2.Qg5#
      • 1...Re5
        • 2.fxg8S#
      • 1...Se2
        • 2.Qg5#
      • 1...Sg2
        • 2.Qg5#
      • 1...Sd5
        • 2.Qg5#
      • 1...Se6
        • 2.Be5#
      • 1...Sg6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD,P_PINP(G),XS(H)::PXR(i)=S
    • R(h);N_GUARD::PXR(i)=S
    • R(i);N_GUARD::PXR(h)=S
    • S(e);OGATE::B(B)
    • S(e);OGATE,XS(H)::B(B)
    • S(e);OGATE::QAB1(A)
  • Tries
    • Try
      • Q(A);XQ(a)
      • Threat
        • QAB(A),XP(d)
      • Vars
        • R(h);N_GUARD,P_PINP(G),XS(H)::PXR(i)=S
        • S(e);OGATE,P_SPINP(f),XP(E)::QAR1(A),XP(f)
      • Refutation
        • R(h);XS(K)
  • Actual
    • S(H);
    • Threat
      • R1(D),XP(f)
    • Vars
      • R(i);N_GUARD,XS(H)::PXR(h)=S
      • S(e);OGATE,XP(E)::QAB1(A)
      • R(h);N_GUARD::PXR(i)=S
      • S(e);OGATE::QAB1(A)
      • S(e);OGATE::B(B)
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