MESON Chess Problem Database

Problem Display
PID: 189753 (1qn2N2/7r/8/5kP1/Q3pB2/R6P/r1p3Pp/2n4K w - - 0 1)

Brody, Miklos

2nd HM., Alkotmany, 1912

1qn2N2/7r/8/5kP1/Q3pB2/R6P/r1p3Pp/2n4K

#2

8 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.g4#
  • Tries
    • 1.Qb5+?
      • 1...Kxf4
        • 2.Se6#
        • 2.Sg6#
        • 2.g3#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qxb5!
    • 1.Qa5+?
      • 1...Kxf4
        • 2.Se6#
        • 2.Sg6#
        • 2.g3#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qb5!
  • Keys
    • 1.Rf3!
      • threat
        • 2.g4#
      • 1...Qxf4
        • 2.Qb5#
      • 1...Rxh3
        • 2.Qd7#
      • 1...Rh4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);::P(B)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(E),XQ(h)
      • Refutation
        • Q(h);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(E),XQ(h)
      • Refutation
        • Q(h);P_SPINQ(h)
  • Actual
    • R(C);
    • Threat
      • P(B)
    • Vars
      • Q(h);N_GUARD,P_SPINQ(h),XB(F)::QAR(E)
      • R(g);N_GUARD,XP(D)::QAB(E)
      • R(g);N_GUARD::QAB(E)
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