MESON Chess Problem Database

Problem Display
PID: 173594 (8/6K1/8/7k/8/3N1PQn/5n2/8 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1926

8/6K1/8/7k/8/3N1PQn/5n2/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qg4#
    • 1...Sh1
      • 2.Qg4#
    • 1...Sxd3
      • 2.Qg4#
    • 1...Se4
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sf4#
  • Tries
    • 1.Kh7?
      • 1...Sxd3
        • 2.Qg4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sd1
        • 2.Qg4#
      • 1...Sh1
        • 2.Qg4#
      • 1...Se4
        • 2.Qg4#
      • 1...Sg1
        • 2.Sf4#
      • 1...Sf4
        • 2.Sxf4#
      • 1...Sg5+!
    • 1.Qxh3+?
      • 1...Kg5
        • 2.f4#
      • 1...Sxh3!
  • Keys
    • 1.f4!
      • 1...Sxd3
        • 2.Qxh3#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Sg1
        • 2.Qg5#
      • 1...Sd1
        • 2.Qxh3#
      • 1...Sh1
        • 2.Qxh3#
      • 1...Se4
        • 2.Qxh3#
      • 1...Sg4
        • 2.Qxh3#
      • 1...Sg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD,XS(A)::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(a);N_GUARD,XS(A)::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
        • S(b);N_GUARD::S(A)
        • S(b);N_GUARD::S(A),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • K(c);P-FLIGHT::P(B)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • P(B);
    • Vars
      • S(a);N_GUARD,XS(A)::QAR2(C),XS(b)
      • S(b);XP(B)::S(A),XS(b)
      • S(b);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR2(C),XS(b)
      • S(b);N_GUARD::QAR1(C),XS(b)
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