MESON Chess Problem Database

Problem Display
PID: 228979 (B3q1b1/bRn1N3/pr3p2/2Q1p3/RN2k1P1/6P1/1K2P3/n7 w - - 0 1)

Ellerman, Arnoldo

Mari, Alberto

L'Echiquier, 1926

B3q1b1/bRn1N3/pr3p2/2Q1p3/RN2k1P1/6P1/1K2P3/n7

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4+
      • 2.Rbxb4#
    • 1...Rc6
      • 2.Sbd5#
    • 1...Re6
      • 2.Sbc6#
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe3#
      • 1...Rxb4+
        • 2.Rbxb4#
      • 1...Rxb7
        • 2.Sd6#
      • 1...Rb5
        • 2.Sd6#
      • 1...Rc6
        • 2.Sd5#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Re6
        • 2.Sc6#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sd5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XS(E)::B(J)+R(H),DCHECK,XR(e)
    • R(e);N_PINS(E)::R(D)+S(E)
  • Actual
    • S(I);
    • Threat
      • QAR1(G)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XS(E)::B(J)+R(H),DCHECK,XR(e)
      • R(e);N_GUARD,P_SPINR(e),XR(H)::S(I)
      • R(e);N_GUARD::S(I)
      • R(e);N_PINS(E)::R(D)+S(E)
      • R(e);N_GUARD,N_PINS(E)::S(I),XR(e)
      • S(a);N_GUARD::QAB(G),XS(a)
      • S(h);S_CUTB(j)::QAR2(G)
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