MESON Chess Problem Database

Problem Display
PID: 264823 (8/r1p4K/NnP2P1n/Q4P2/3Bk3/2P1p3/4B2b/1b1R1R2 w - - 0 1)

Wirtanen, Erkki Aukusti

1st Prize, Skakbladet TT, 1958

8/r1p4K/NnP2P1n/Q4P2/3Bk3/2P1p3/4B2b/1b1R1R2

#2

11 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Bd3#
    • 1...Bd3
      • 2.Bxd3#
    • 1...Bg1
      • 2.Qe5#
    • 1...Bf4
      • 2.Bf3#
    • 1...Be5
      • 2.Qxe5#
    • 1...Sd5
      • 2.Sc5#
    • 1...Sxf5
      • 2.Qxf5#
  • Tries
    • 1.Bxb6?
      • threat
        • 2.Rd4#
        • 2.Qd5#
      • 1...Sxf5
        • 2.Qd5#
        • 2.Qxf5#
      • 1...Ba2
        • 2.Bd3#
        • 2.Rd4#
      • 1...Bd3
        • 2.Bxd3#
      • 1...Be5
        • 2.Sc5#
        • 2.Qd5#
      • 1...cxb6+!
    • 1.Qd5+?
      • 1...Sxd5
        • 2.Sc5#
      • 1...Kxd5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rd4#
      • 1...Bxe5
        • 2.Sc5#
      • 1...Sxf5
        • 2.Bf3#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Bxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::B(C)
    • B(a);N_GUARD::B(C),XB(a)
    • B(b);N_GUARD::QAR1(F)
    • B(b);SBLOCK::B(C)
    • B(b);N_GUARD::QAR1(F),XB(b)
    • S(e);SBLOCK::S(H)
    • S(f);OGATE,XP(G)::QAB1(F),XS(f)
  • Tries
    • Try
      • B(E);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::B(C),XB(a)
      • Refutation
        • P(h);CHECK,XB(E)
    • Try
      • Q(F);CHECK
      • Vars
        • S(e);SBLOCK,XQ(F)::S(H)
      • Refutation
        • K(d);P_PINP(G),S_FLIGHT,XQ(F)
  • Actual
    • B(E);
    • Threat
      • R1(A)
    • Vars
      • B(b);SBLOCK,XB(E)::S(H)
      • S(f);SBLOCK,XP(G)::B(C)
      • B(b);N_GUARD::R1(B),XB(b)
      • S(e);N_GUARD::QAB1(F),XS(e)
      • B(a);N_GUARD::B(C),XB(a)
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