MESON Chess Problem Database

Problem Display
PID: 110460 (3R4/8/1p2bp1N/1RnnkB2/8/1Q2P3/4N3/b6K w - - 0 1)

Ruonala, Lauri Armas

Dunaujvarosi Hirlap, 1962-1964

3R4/8/1p2bp1N/1RnnkB2/8/1Q2P3/4N3/b6K

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.exd4#
    • 1...Bxf5
      • 2.Qxd5#
    • 1...Bc8
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Sc3
      • 2.Qxe6#
    • 1...Sxe3
      • 2.Qxe6#
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qxe6#
    • 1...Sf4
      • 2.exf4#
    • 1...Se7
      • 2.Qxe6#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Sg4#
      • 1...Bxf5
        • 2.Qxd5#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Bd7
        • 2.Sf7#
      • 1...Sd7!
    • 1.e4?
      • threat
        • 2.Sg4#
      • 1...Bxf5
        • 2.Qxd5#
      • 1...Bd7
        • 2.Sf7#
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qg3#
      • 1...Se3
        • 2.Qxe6#
      • 1...Sxe4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Sg4#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Sxe3
        • 2.Qe4#
      • 1...Bd7
        • 2.Sf7#
      • 1...Sd7
        • 2.Qc7#
      • 1...Sd3
        • 2.Qc7#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE::P(D),XB(a)
    • B(f);N_GUARD,XB(F)::QAR1(C),XS(c)
    • S(c);OGATE,P_SPINS(b)::QAR1(C),XB(f)
    • S(c);OGATE,P_SPINS(b)::P(D),XS(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(G)
      • Vars
        • B(f);N_GUARD,XB(F)::QAR1(C),XS(c)
        • S(c);OGATE,P_SPINS(b),XP(D)::QAR2(C),XS(c)
        • B(f);N_GUARD::S(G)
      • Refutation
        • S(b);P_SPINS(c)
    • Try
      • P(D);
      • Threat
        • S(G)
      • Vars
        • B(f);N_GUARD,XB(F)::QAR1(C),XS(c)
        • S(b);P_SPINS(c)::QAB(C)
        • S(c);OGATE,P_SPINS(b)::QAR1(C),XB(f)
      • Refutation
        • S(b);P_SPINS(c),XP(D)
  • Actual
    • Q(C);
    • Threat
      • S(G)
    • Vars
      • B(f);OGATE,XB(F)::QAR1(C),XB(f)
      • S(c);P_SPINS(b),XP(D)::QAR1(C)
      • B(f);N_GUARD::S(G)
      • S(b);OGATE,P_SPINS(c)::QAB(C)
      • S(b);N_GUARD,P_SPINS(c)::QAR1(C),XS(b)
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