MESON Chess Problem Database

Problem Display
PID: 83751 (B1Q4K/5N1p/7p/5P2/Rb2bk2/r4NpP/1p4P1/1qn2RB1 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd KNSB, 1925

B1Q4K/5N1p/7p/5P2/Rb2bk2/r4NpP/1p4P1/1qn2RB1

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3+
      • 2.S3e5#
    • 1...Bxf5
      • 2.Qc7#
      • 2.Qb8#
  • Tries
    • 1.Sh4+?
      • 1...Bf3
        • 2.Qc7#
        • 2.Qb8#
      • 1...Rf3!
    • 1.Qe6?
      • threat
        • 2.Qe5#
      • 1...Bc3+
        • 2.S3e5#
      • 1...Sd3
        • 2.Qxe4#
      • 1...Bd6!
    • 1.f6?
      • threat
        • 2.Qg4#
      • 1...Bf5
        • 2.Qc7#
        • 2.Qb8#
      • 1...h5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg4#
      • 1...Bc3+
        • 2.S3e5#
      • 1...Kxf5
        • 2.Sd4#
      • 1...Bxf5
        • 2.Qb8#
      • 1...h5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(f);CHECK,P_SPINB(g),S_CUTR(d)::R(A)+S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • B(f);CHECK,P_SPINB(g),S_CUTR(d)::R(A)+S(D)
        • S(b);S_CUTQ(a)::QAR1(J),XB(g)
      • Refutation
        • B(f);P_SPINB(g)
    • Try
      • P(G);
      • Threat
        • QAR1(J)
      • Refutation
        • P(i);
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • B(f);CHECK,P_SPINB(g),S_CUTR(d)::R(A)+S(D)
      • K(h);P-FLIGHT,XP(G)::R(A)+S(D),DCHECK
      • B(g);P_SPINB(f),SBLOCK,XP(G)::QAB(J)
      • P(i);N_GUARD::QAB1(J)
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