MESON Chess Problem Database

Problem Display
PID: 134584 (2bQ4/b1P2N1B/2p4p/rRn1rp2/2p1k3/1nB2R1K/p4pP1/8 w - - 0 1)

Ellerman, Arnoldo

The Field, 1965

(First published on Thu Nov 4 1965)

2bQ4/b1P2N1B/2p4p/rRn1rp2/2p1k3/1nB2R1K/p4pP1/8

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qh4#
    • 1...Re6
      • 2.Bxf5#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sd3
      • 2.Sd6#
    • 1...Sa4
      • 2.Sd6#
      • 2.Qh4#
    • 1...Sa6
      • 2.Sd6#
      • 2.Qh4#
    • 1...Se6
      • 2.Sd6#
    • 1...Sb7
      • 2.Qh4#
    • 1...Sd7
      • 2.Sd6#
      • 2.Qh4#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Sd6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rd5
        • 2.Qe2#
      • 1...Re6
        • 2.Bxf5#
      • 1...Sb7
        • 2.Qc2#
      • 1...Sd2!
    • 1.Qd2?
      • threat
        • 2.Sd6#
        • 2.Rf4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...f1Q
        • 2.Sd6#
      • 1...f1R
        • 2.Sd6#
      • 1...Rd5
        • 2.Rf4#
        • 2.Qe3#
        • 2.Qf4#
        • 2.Qe2#
      • 1...Re6
        • 2.Bxf5#
        • 2.Rf4#
      • 1...Sd3
        • 2.Sd6#
      • 1...Se6
        • 2.Sd6#
        • 2.Qc2#
      • 1...Sb7
        • 2.Rf4#
        • 2.Qf4#
        • 2.Qc2#
      • 1...Sxd2!
    • 1.Qd3+?
      • 1...Sxd3
        • 2.Sd6#
      • 1...cxd3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxe5#
      • 1...Kd5
        • 2.Qxe5#
      • 1...Rd5
        • 2.Qh4#
      • 1...Re6
        • 2.Qxf5#
      • 1...Re7
        • 2.Qxc6#
      • 1...Re8
        • 2.Qxc6#
      • 1...Sd3
        • 2.Sd6#
      • 1...Sd7
        • 2.Sd6#
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(h);SBLOCK::QAR(I)
    • R(h);N_GUARD,S_CUTB(m)::B(H),XP(i)
    • S(c);N_GUARD::QAR1(I)
    • S(c);N_GUARD::QAR1(I),XS(c)
    • S(g);::S(G)
    • S(g);::QAR(I)
    • P(k);N_GUARD::S(G)
  • Tries
    • Try
      • Q(I);
      • Threat
        • S(G)
      • Vars
        • S(c);N_GUARD::QAR1(I),XS(c)
        • R(h);SBLOCK::QAR2(I)
        • R(h);N_GUARD,S_CUTB(m)::B(H),XP(i)
        • S(g);N_GUARD::QAB(I)
      • Refutation
        • S(c);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::QAR1(I),XS(c)
        • P(b);P_PINP(A)::S(G)
        • P(b);::S(G)
        • S(g);::S(G)
      • Refutation
        • S(c);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • S(g);XQ(I)::S(G)
      • Refutation
        • P(d);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I),XR(h)
    • Vars
      • K(e);N_SPINP(i),P_SPINS(g),S_FLIGHT::QAR1(I),XR(h)
      • R(h);SBLOCK::QAR(I)
      • R(h);N_GUARD,S_CUTB(m)::QAB1(I),XP(i)
      • R(h);N_GUARD::QAB(I),XP(j)
      • S(g);::S(G)
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