MESON Chess Problem Database

Problem Display
PID: 83687 (2Q5/q2nK2B/3P1R1P/3pp1Np/6kP/3r2r1/3bP2R/1b2B2N w - - 0 1)

Ellerman, Arnoldo

Europe Echecs, 1965

2Q5/q2nK2B/3P1R1P/3pp1Np/6kP/3r2r1/3bP2R/1b2B2N

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qxd7#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qe3
      • 2.Qxd7#
    • 1...Qd4
      • 2.Qxd7#
    • 1...Qc5
      • 2.Qxd7#
    • 1...Qb6
      • 2.Qxd7#
    • 1...Qb8
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qa1
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qa2
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qa3
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qa4
      • 2.Sf2#
    • 1...Qa5
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qa6
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Qb7
      • 2.Sf2#
    • 1...Qc7
      • 2.Sf2#
    • 1...Qa8
      • 2.Sf2#
      • 2.Qxd7#
    • 1...Rde3
      • 2.Sf2#
    • 1...Rd4
      • 2.Sf2#
    • 1...Bf4
      • 2.Bf5#
    • 1...d4
      • 2.Sf2#
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sxe5#
      • 1...Qe3
        • 2.Qxd7#
      • 1...Qd4
        • 2.Qxd7#
      • 1...Qa1
        • 2.Sf2#
        • 2.Qxd7#
      • 1...Rde3
        • 2.Sf2#
      • 1...Rge3
        • 2.Qg8#
      • 1...Bc3
        • 2.Qg8#
      • 1...Bf4
        • 2.Bf5#
      • 1...e4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(i);N_GUARD::QAB(L),XS(j)
    • Q(i);N_GUARD::S(B),XQ(i)
    • Q(i);N_GUARD,P_PINP(G)::QAB(L),XS(j)
    • Q(i);N_GUARD::S(B)
    • R(c);S_CUTQ(i)::S(B)
    • B(b);SBLOCK::B(K)
    • P(f);S_CUTQ(i)::S(B)
  • Actual
    • S(F);
    • Threat
      • S(F),XP(g)
    • Vars
      • Q(i);N_GUARD::QAB(L),XS(j)
      • R(c);S_CUTQ(i)::S(B)
      • R(d);S_CUTB(b)::QAR(L)
      • B(b);N_GUARD::QAR(L)
      • B(b);SBLOCK::B(K)
      • P(g);::S(F)
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