MESON Chess Problem Database

Problem Display
PID: 202303 (8/6r1/2PpNPP1/3k1K1R/1p1Pnp1p/3R1np1/2Q3B1/2b2r1b w - - 0 1)

Ellerman, Arnoldo

6th HM., Il Secolo, 1923

8/6r1/2PpNPP1/3k1K1R/1p1Pnp1p/3R1np1/2Q3B1/2b2r1b

#2

10 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg6
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Rg8
      • 2.Sc7#
    • 1...Bb2
      • 2.Sxf4#
    • 1...Ba3
      • 2.Sxf4#
    • 1...Sxd4+
      • 2.Rxd4#
    • 1...Se5
      • 2.dxe5#
    • 1...Sd2
      • 2.Sxf4#
  • Keys
    • 1.Sd8!
      • threat
        • 2.Qb3#
      • 1...Sxd4+
        • 2.Kg4#
      • 1...Sfd2
        • 2.Kg4#
      • 1...Se5
        • 2.dxe5#
      • 1...Sed2
        • 2.Kxf4#
      • 1...Sc5
        • 2.dxc5#
      • 1...b3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(l);N_GUARD,XP(J)::S(H)
    • R(l);N_GUARD::S(H),XR(l)
    • R(l);N_GUARD::S(H)
    • B(a);N_GUARD::S(H),XP(h)
    • S(d);CHECK,OGATE,P_SPINS(d),XP(D)::R1(C),XS(d)
    • S(d);OGATE,P_SPINS(g)::R(C)+P(D),XS(d)
    • S(g);P_SPINS(d),S_CUTB(a)::S(H),XP(h)
  • Actual
    • S(H);
    • Threat
      • QAB(A)
    • Vars
      • S(d);CHECK,N_GUARD,P_SPINS(d),S_CUTS(g),XP(D)::R(F)+K(E)
      • S(d);N_GUARD,P_SPINS(g)::R(F)+K(E)
      • S(d);OGATE,P_SPINS(g)::R(C)+P(D),XS(d)
      • S(g);P_SPINS(d)::R(F)+K(E),XP(h)
      • S(g);OGATE,P_SPINS(d)::R(C)+P(D),XS(g)
      • P(f);::QAB(A),XP(f)
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Developed and maintained by Brian Stephenson.
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