MESON Chess Problem Database

Problem Display
PID: 21731 (B6K/bR2P3/7B/4r2p/b1Qpk3/q1p1NRpr/6P1/8 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift, 1920

B6K/bR2P3/7B/4r2p/b1Qpk3/q1p1NRpr/6P1/8

#2

9 + 10

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rb5#
    • 1...Rb5
      • 2.Rxb5#
    • 1...Rxe7
      • 2.Rxe7#
  • Tries
    • 1.Rb6+?
      • 1...Rd5
        • 2.Re6#
      • 1...Bc6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rf4#
      • 1...Rxf5
        • 2.Re3#
      • 1...Rxe7
        • 2.Rxe7#
      • 1...Ra5
        • 2.Rb5#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Rc5
        • 2.Qxd4#
      • 1...Rd5
        • 2.Qe2#
      • 1...Re6
        • 2.Qxe6#
      • 1...Qc1
        • 2.Sd6#
      • 1...Rh4
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD::B(H)+R(F)
    • R(h);N_GUARD::B(H)+R(F),XR(h)
    • R(h);OGATE,XP(G)::B(H)+R(F),DCHECK,XR(h)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • R(h);P_SPINR(h),S_CUTB(e)::R(F)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • S(B);
    • Threat
      • R1(C)
    • Vars
      • R(h);SBLOCK,XS(B)::R1(C)
      • R(h);OGATE,XP(G)::B(H)+R(F),DCHECK,XR(h)
      • R(h);N_GUARD::B(H)+R(F)
      • R(h);N_GUARD::B(H)+R(F),XR(h)
      • R(h);S_CUTB(j)::QAR1(D),XP(f)
      • R(h);SBLOCK::QAR2(D)
      • R(h);OGATEB::QAR2(D),XR(h)
      • Q(a);N_GUARD::S(B)
      • R(d);N_GUARD::S(B),XP(c)
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