MESON Chess Problem Database

Problem Display
PID: 272189 (2B4K/1Qp5/NbnP4/1b1kpNp1/4n2R/BP6/1r1q4/3R4 w - - 0 1)

Wirtanen, Erkki Aukusti

1st Prize, Zurcher Woche, 1959

(First published on Fri May 1 1959)

2B4K/1Qp5/NbnP4/1b1kpNp1/4n2R/BP6/1r1q4/3R4

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Se3#
      • 2.Se7#
    • 1...Bg1
      • 2.Sxc7#
    • 1...Bf2
      • 2.Sxc7#
    • 1...Be3
      • 2.Sxc7#
    • 1...Bd4
      • 2.Se7#
      • 2.Sxc7#
    • 1...Bc5
      • 2.Sxc7#
    • 1...Ba7
      • 2.Sxc7#
    • 1...Sf2
      • 2.Se7#
    • 1...Sc3
      • 2.Se7#
    • 1...Sg3
      • 2.Se7#
    • 1...Sc5
      • 2.Sb4#
    • 1...Sxd6
      • 2.Se7#
    • 1...Sf6
      • 2.Se7#
    • 1...cxd6
      • 2.Qf7#
  • Tries
    • 1.Qxc6+?
      • 1...Kxc6
        • 2.Se7#
      • 1...Bxc6!
    • 1.Qxb6?
      • threat
        • 2.Se3#
        • 2.Sxc7#
      • 1...Bxa6
        • 2.Se3#
      • 1...cxb6
        • 2.Sc7#
      • 1...cxd6
        • 2.Se3#
        • 2.Sc7#
      • 1...Bd3
        • 2.Sxc7#
      • 1...Sc5
        • 2.Sxc7#
        • 2.Qxc5#
      • 1...Sd4
        • 2.Se7#
        • 2.Sxc7#
      • 1...Rxb3!
  • Keys
    • 1.Qxc7!
      • threat
        • 2.Qf7#
      • 1...Bxc7
        • 2.Sxc7#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sc5
        • 2.Se3#
      • 1...Sb4
        • 2.Sxb4#
      • 1...Sd4
        • 2.Se7#
      • 1...Sa5
        • 2.Sb4#
      • 1...Sa7
        • 2.Sb4#
      • 1...Se7
        • 2.Sb4#
      • 1...Sb8
        • 2.Sb4#
      • 1...Sd8
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 10
  • Sets
    • B(h);N_GUARD::S(F),XP(j)
    • S(c);::S(E)
    • S(c);SBLOCK::S(F)
    • S(c);XP(G)::S(E)
    • P(j);OGATE,XP(G)::QAB(H)
  • Tries
    • Try
      • Q(H);CHECK,XS(i)
      • Vars
        • K(e);N_GUARD,N_SPINQ(b),S_FLIGHT,XQ(H)::S(E)
      • Refutation
        • B(d);XQ(H)
    • Try
      • Q(H);N_PINS(i),XB(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XS(F)::S(E)
        • P(j);XQ(H)::S(F)
        • B(d);N_SPINQ(b)::S(F),XP(j)
      • Refutation
        • R(a);XP(C)
  • Actual
    • Q(H);N_PINS(i),XP(j)
    • Threat
      • QAB(H)
    • Vars
      • B(h);XQ(H)::S(F),XB(h)
      • S(c);OGATE,XP(G)::QAR1(H),XS(c)
      • S(c);S_CUTB(h)::S(E)
      • S(i);N_GUARD::S(F),XS(i)
      • S(i);N_GUARD,N_SPINQ(b),SBLOCK::S(E)
      • S(i);N_GUARD::S(F)
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