MESON Chess Problem Database

Problem Display
PID: 246347 (4r3/2p3K1/2Np1p2/R1BN1k2/4pPbP/5R2/B2p1bQ1/3q1n2 w - - 0 1)

Ellerman, Arnoldo

Sjakk-Nytt, 1948

4r3/2p3K1/2Np1p2/R1BN1k2/4pPbP/5R2/B2p1bQ1/3q1n2

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re7+
      • 2.Sdxe7#
    • 1...Ra8
      • 2.Sde7#
    • 1...Rb8
      • 2.Sde7#
    • 1...Rc8
      • 2.Sde7#
    • 1...Rd8
      • 2.Sde7#
    • 1...Rf8
      • 2.Sde7#
    • 1...Rh8
      • 2.Sde7#
    • 1...Be1
      • 2.Sd4#
    • 1...Bg3
      • 2.Sd4#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Bxh4
      • 2.Sd4#
    • 1...Bh3
      • 2.Qxh3#
    • 1...Se3
      • 2.Sd4#
  • Tries
    • 1.Se3+?
      • 1...Sxe3
        • 2.Sd4#
      • 1...Bxe3!
    • 1.Sce7+?
      • 1...Rxe7+
        • 2.Sxe7#
      • 1...Ke6!
  • Keys
    • 1.Sde7+!
      • 1...Rxe7+
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • R(k);CHECK,N_GUARD::S(H),XR(k)
    • R(k);N_GUARD::S(H)
    • B(d);N_GUARD::S(I)
    • B(d);N_GUARD::S(I),XB(d)
    • B(d);N_GUARD,XP(E)::S(I)
    • B(f);OGATEB::QAB(B),XB(f)
    • S(b);S_CUTB(d)::S(I)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(b);XS(H)::S(I)
      • Refutation
        • B(d);XS(H)
    • Try
      • S(I);CHECK
      • Vars
        • R(k);CHECK,XS(I)::S(H),XR(k)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • S(H);CHECK
    • Vars
      • R(k);CHECK,XS(H)::S(I),XR(k)
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Developed and maintained by Brian Stephenson.
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