MESON Chess Problem Database

Problem Display
PID: 282719 (8/3prR2/1p4pK/3p2pp/1Qp1knqR/3nPN2/2BpP3/1bb2N2 w - - 0 1)

Wirtanen, Erkki Aukusti

Comm., Zurcher Woche, 1959

8/3prR2/1p4pK/3p2pp/1Qp1knqR/3nPN2/2BpP3/1bb2N2

#2

9 + 15

15601 Albrecht-Leiss-Degener Collection 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Qxe7#
    • 1...Qg1
      • 2.Qxe7#
    • 1...Qg2
      • 2.Qxe7#
    • 1...Qg3
      • 2.Qxe7#
    • 1...Sxe2
      • 2.Qxe7#
    • 1...Sg2
      • 2.Qxe7#
      • 2.exd3#
    • 1...Sh3
      • 2.Qxe7#
      • 2.exd3#
    • 1...Se6
      • 2.exd3#
  • Tries
    • 1.Sg3+?
      • 1...Qxg3
        • 2.Qxe7#
      • 1...Kxe3!
    • 1.Qxc4+?
      • 1...d4
        • 2.Qxd4#
      • 1...dxc4!
    • 1.Qxb6?
      • threat
        • 2.Qd4#
      • 1...Sxe2
        • 2.Qxg6#
      • 1...d4
        • 2.Qxd4#
      • 1...Bb2
        • 2.S1xd2#
      • 1...Se6
        • 2.Sg3#
      • 1...Rxf7!
    • 1.exd3+?
      • 1...Sxd3
        • 2.Qxe7#
      • 1...Kxf3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qd4#
      • 1...Rxf7
        • 2.Qe5#
      • 1...Sxe2
        • 2.Sxg5#
      • 1...d4
        • 2.Qxd4#
      • 1...Bb2
        • 2.S3xd2#
      • 1...Se6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD,S_CUTS(g),XS(E)::QAR(F),XR(o)
    • Q(h);N_GUARD,S_CUTS(g)::QAR(F),XR(o)
    • S(g);N_GUARD,P_SPINQ(h),XP(C)::QAR(F),XR(o)
    • S(g);N_GUARD,P_SPINQ(h)::P(C),XS(d)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • Q(h);XS(A)::QAR(F),XR(o)
      • Refutation
        • K(f);N_SPINP(e),N_SPINS(d),P-FLIGHT,XP(D)
    • Try
      • Q(F);CHECK,XP(e)
      • Vars
        • P(i);P_SPINP(i)::QAR1(F),XP(i)
      • Refutation
        • P(i);XQ(F)
    • Try
      • Q(F);N_PINP(e),XP(l)
      • Threat
        • QAR1(F)
      • Vars
        • S(g);N_GUARD,P_SPINQ(h),XP(C)::QAB(F),XP(m)
        • P(i);::QAR1(F),XP(i)
        • B(b);N_GUARD::S(A),XP(c)
        • S(g);P_SPINQ(h)::S(A)
      • Refutation
        • R(o);XR(I)
    • Try
      • P(C);CHECK,XS(d)
      • Vars
        • S(g);P_SPINQ(h),P_SPINS(g),XP(C)::QAR(F),XR(o)
      • Refutation
        • K(f);N_SPINP(e),P_SPINS(g),S_FLIGHT,XS(E)
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • QAR1(F)
    • Vars
      • R(o);N_GUARD,XR(I)::QAR1(F)
      • S(g);P_SPINQ(h),XP(C)::S(E),XP(j)
      • P(i);::QAR1(F),XP(i)
      • B(b);N_GUARD::S(E),XP(c)
      • S(g);P_SPINQ(h),S_CUTR(o)::QAR1(F)
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