MESON Chess Problem Database

Problem Display
PID: 173663 (Nb3n2/1BppQP1p/2r2p1K/3k1P2/nP3P2/3P4/4N3/8 w - - 0 1)

Boros, Sandor

Comm., Grantham Journal, 1928

Nb3n2/1BppQP1p/2r2p1K/3k1P2/nP3P2/3P4/4N3/8

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sxc7#
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...Se6
      • 2.Qxd7#
    • 1...Sg6
      • 2.Qxd7#
    • 1...d6
      • 2.Qe4#
  • Tries
    • 1.Kh5?
      • 1...Ba7
        • 2.Sxc7#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Se6
        • 2.Qxd7#
      • 1...Sg6
        • 2.Qxd7#
      • 1...d6
        • 2.Qe4#
      • 1...h6!
    • 1.Sc3+?
      • 1...Sxc3
        • 2.Qc5#
      • 1...Kd4!
    • 1.Sb6+?
      • 1...Sxb6
        • 2.Qc5#
      • 1...cxb6!
    • 1.Qxf8?
      • 1...Ba7
        • 2.Sxc7#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d6!
  • Keys
    • 1.Qxf6!
      • 1...Se6
        • 2.Qe5#
      • 1...Ba7
        • 2.Sxc7#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sc5
        • 2.Sc3#
      • 1...Sb6
        • 2.Sc3#
      • 1...Sg6
        • 2.Qd4#
      • 1...d6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::S(J),XP(e)
    • S(a);N_GUARD::QAR1(H)
    • S(a);N_GUARD::QAR1(H),XS(a)
    • S(i);N_GUARD::QAR2(H),XP(f)
    • P(f);SBLOCK::QAB1(H)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • B(h);N_GUARD::S(J),XP(e)
        • S(a);N_GUARD::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
        • S(i);N_GUARD::QAR2(H),XP(f)
        • P(f);SBLOCK::QAB1(H)
      • Refutation
        • P(g);
    • Try
      • S(A);CHECK
      • Vars
        • S(a);XS(A)::QAR1(H)
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT
    • Try
      • S(J);CHECK
      • Vars
        • S(a);XS(J)::QAR1(H)
      • Refutation
        • P(e);XS(J)
    • Try
      • Q(H);XS(i)
      • Vars
        • B(h);N_GUARD::S(J),XP(e)
        • S(a);N_GUARD::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
      • Refutation
        • P(f);
  • Actual
    • Q(H);P_SPINQ(H),XP(d)
    • Vars
      • S(i);N_PINQ(H)::QAR1(H)
      • B(h);N_GUARD::S(J),XP(e)
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
      • P(f);N_PINQ(H),SBLOCK::QAR1(H)
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