MESON Chess Problem Database

Problem Display
PID: 83791 (2N1Bb2/1pn2r1Q/NB2p1R1/1Pnk3p/R4P2/1PP1p3/3r1PPK/1b6 w - - 0 1)

Ellerman, Arnoldo

4th HM., Problemas, 1965

2N1Bb2/1pn2r1Q/NB2p1R1/1Pnk3p/R4P2/1PP1p3/3r1PPK/1b6

#2

14 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rd4#
    • 1...Rb2
      • 2.Rd4#
    • 1...Rc2
      • 2.Rd4#
    • 1...Re2
      • 2.Rd4#
    • 1...Rxf2
      • 2.Rd4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Rf5
      • 2.Sxc7#
    • 1...Rf6
      • 2.Sxc7#
    • 1...Bd3
      • 2.Rd4#
    • 1...Be4
      • 2.Sb4#
    • 1...Be7
      • 2.Sxc7#
    • 1...Sd3
      • 2.Rd4#
    • 1...Se4
      • 2.c4#
    • 1...Sd7
      • 2.Sxc7#
    • 1...bxa6
      • 2.Bc6#
  • Tries
    • 1.Rg5+?
      • 1...Rf5
        • 2.Sxc7#
      • 1...e5
        • 2.Rxe5#
      • 1...Bf5!
    • 1.Qxh5+?
      • 1...Rf5
        • 2.Sxc7#
      • 1...e5
        • 2.Qxe5#
      • 1...Bf5!
  • Keys
    • 1.Rxe6!
      • threat
        • 2.Re5#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Rxf4
        • 2.Sxc7#
      • 1...S5xe6
        • 2.c4#
      • 1...S7xe6
        • 2.Sb4#
      • 1...Rf5
        • 2.Sxc7#
      • 1...Re7
        • 2.Rd6#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Bg7
        • 2.Rd6#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sd7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 12
  • Sets
    • R(b);N_GUARD::R1(F)
    • R(b);N_GUARD,P_PINP(B),XP(A)::R1(F)
    • R(b);N_GUARD::R1(F),XR(b)
    • R(j);N_GUARD::S(I),XS(i)
    • B(a);S_CUTR(b)::R1(F)
    • B(a);SBLOCK::S(I)
    • B(k);S_CUTR(j)::S(I),XS(i)
    • S(d);S_CUTR(b)::R1(F)
    • S(d);SBLOCK::P(E)
    • S(d);S_CUTR(j)::S(I),XS(i)
    • P(h);N_GUARD,XS(I)::B(N)
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • R(j);P_SPINR(j)::S(I),XS(i)
        • P(g);P_SPINP(g)::R1(K),XP(g)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(L);CHECK,XP(f)
      • Vars
        • R(j);P_SPINR(j)::S(I),XS(i)
        • P(g);P_SPINP(g)::QAR1(L),XP(g)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • R(K);XP(g)
    • Threat
      • R1(K)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(K)::QAB1(L),XR(j)
      • R(j);N_GUARD,XP(G)::S(I),XS(i)
      • S(d);SBLOCK,XR(K)::P(E)
      • S(i);SBLOCK,XR(K)::S(I)
      • R(j);N_GUARD::S(I),XS(i)
      • R(j);S_CUTB(k)::R1(K)
      • B(k);N_GUARD,P_PINP(G)::R1(K),XB(k)
      • B(k);N_GUARD::R1(K)
      • S(d);N_GUARD,S_CUTB(a)::QAB1(L)
      • S(d);S_CUTR(j)::S(I),XS(i)
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