MESON Chess Problem Database

Problem Display
PID: 246483 (4N3/1b6/1p1rp2K/4k3/4N2R/2p2RP1/3p4/BB2Q3 w - - 0 1)

Wirtanen, Erkki Aukusti

Sjakk-Nytt, 1946

4N3/1b6/1p1rp2K/4k3/4N2R/2p2RP1/3p4/BB2Q3

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rh5#
    • 1...Rd5
      • 2.Sxd2#
    • 1...Bxe4
      • 2.Qxe4#
    • 1...Bd5
      • 2.Bxc3#
  • Tries
    • 1.Sxd2+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Bxc3+?
      • 1...Rd4
        • 2.Rh5#
      • 1...Kd5!
  • Keys
    • 1.Rxc3!
      • threat
        • 2.Rc5#
      • 1...Kd4
        • 2.Rc5#
      • 1...Kd5
        • 2.S4f6#
      • 1...Kf5
        • 2.S4xd6#
        • 2.Rf3#
      • 1...Rd4
        • 2.Rh5#
      • 1...Rd5
        • 2.Sxd2#
      • 1...Bd5
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);N_SPINP(b),SBLOCK::R(G)
    • R(e);SBLOCK,S_CUTB(g)::QAR(C)+S(F),XP(a)
    • B(g);OGATE,P_SPINB(g),XS(F)::QAR1(C),XB(g)
    • B(g);SBLOCK,S_CUTR(e)::B(A),XP(b)
  • Tries
    • Try
      • S(F);CHECK,XP(a)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(C),XB(g)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT
    • Try
      • B(A);CHECK,XP(b)
      • Vars
        • R(e);P_SPINR(e)::R(G)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(D);XP(b)
    • Threat
      • B(A)+R(D),DCHECK
    • Vars
      • K(c);S_FLIGHT::B(A)+R(D)
      • K(c);P-FLIGHT::S(F)
      • R(e);SBLOCK::R(G)
      • R(e);SBLOCK,S_CUTB(g)::QAR(C)+S(F),XP(a)
      • B(g);SBLOCK,S_CUTR(e)::B(A)+R(D)
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