MESON Chess Problem Database

Problem Display
PID: 19476 (2rNr3/1p1Q1p2/3b4/1n3n2/RP1k1PR1/1KpNp3/4P1B1/8 w - - 0 1)

Wirtanen, Erkki Aukusti

1st Prize, Magasinet, 1957

2rNr3/1p1Q1p2/3b4/1n3n2/RP1k1PR1/1KpNp3/4P1B1/8

#2

10 + 10

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.bxc5#
    • 1...Re5
      • 2.fxe5#
    • 1...Sc7
      • 2.b5#
    • 1...Se7
      • 2.f5#
  • Tries
    • 1.Qxf5?
      • threat
        • 2.Qd5#
      • 1...Rc5
        • 2.bxc5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re5
        • 2.fxe5#
      • 1...Be5
        • 2.Qe4#
        • 2.fxe5#
      • 1...Sc7!
    • 1.Qxf7?
      • threat
        • 2.Qd5#
      • 1...Rc5
        • 2.bxc5#
      • 1...Re5
        • 2.fxe5#
      • 1...Re6
        • 2.Sxe6#
      • 1...Sc7
        • 2.Qc4#
      • 1...Se7
        • 2.Se6#
      • 1...Re4!
  • Keys
    • 1.Qxb7!
      • threat
        • 2.Qd5#
      • 1...Rc5
        • 2.bxc5#
      • 1...Rc6
        • 2.Sxc6#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re5
        • 2.fxe5#
      • 1...Sc7
        • 2.Sc6#
      • 1...Se7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(i);OGATE::R(E)+P(F),XR(i)
    • R(j);OGATE::R(H)+P(G),XR(j)
    • S(d);OGATE::R(E)+P(F)
    • S(e);OGATE::R(H)+P(G)
  • Tries
    • Try
      • Q(I);N_PINB(f),XS(e)
      • Threat
        • QAR1(I)
      • Vars
        • R(i);OGATE::R(E)+P(F),XR(i)
        • R(j);N_GUARD::QAR1(I),XR(j)
        • R(j);OGATE::R(H)+P(G),XR(j)
      • Refutation
        • S(d);
    • Try
      • Q(I);N_PINB(f),XP(h)
      • Threat
        • QAR1(I)
      • Vars
        • R(i);OGATE::R(E)+P(F),XR(i)
        • R(j);OGATE::R(H)+P(G),XR(j)
        • R(j);N_GUARD::S(J),XR(j)
        • S(d);S_CUTR(i)::QAR1(I)
        • S(e);S_CUTR(j)::S(J)
      • Refutation
        • R(j);
  • Actual
    • Q(I);N_PINB(f),XP(g)
    • Threat
      • QAR1(I)
    • Vars
      • R(i);OGATE::R(E)+P(F),XR(i)
      • R(i);N_GUARD::S(J),XR(i)
      • R(j);N_GUARD::QAR1(I),XR(j)
      • R(j);OGATE::R(H)+P(G),XR(j)
      • S(d);S_CUTR(i)::S(J)
      • S(e);S_CUTR(j)::QAR1(I)
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