MESON Chess Problem Database

Problem Display
PID: 160833 (8/3p4/3p4/pp1Q4/k7/p2N4/K7/n7 w - - 0 1)

Agarski, Jan

Praca Prvotina, 1951

8/3p4/3p4/pp1Q4/k7/p2N4/K7/n7

#2

3 + 7

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
  • Tries
    • 1.Kxa1?
      • 1...a2
        • 2.Qxa2#
      • 1...b4!
    • 1.Sc1?
      • 1...Kb4
        • 2.Qd4#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...b4!
    • 1.Se1?
      • 1...Kb4
        • 2.Qd4#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...b4!
    • 1.Sb2+?
      • 1...Kb4
        • 2.Qd4#
      • 1...axb2!
    • 1.Sf2?
      • 1...Kb4
        • 2.Qd4#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...b4!
    • 1.Sf4?
      • 1...Kb4
        • 2.Qd4#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...b4!
    • 1.Sc5+?
      • 1...Kb4
        • 2.Qd4#
      • 1...dxc5!
    • 1.Qf7?
      • 1...b4
        • 2.Qxd7#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...d5!
    • 1.Qxd6?
      • threat
        • 2.Qxa3#
      • 1...b4
        • 2.Qxd7#
      • 1...Sc2!
  • Keys
    • 1.Sb4!
      • 1...Kxb4
        • 2.Qd4#
      • 1...axb4
        • 2.Qa8#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Vars
        • P(b);OGATEB::QAR2(C),XP(b)
      • Refutation
        • P(e);
    • Try
      • S(B);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(B);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • P(b);XS(B)
    • Try
      • S(B);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(B);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • P(f);XS(B)
    • Try
      • Q(C);
      • Vars
        • P(e);OGATEB::QAB(C),XP(g)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(f);
    • Try
      • Q(C);XP(f)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • P(e);OGATEB::QAB(C),XP(g)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Vars
      • K(c);OGATEB,P-FLIGHT,XS(B)::QAR2(C)
      • P(d);OGATEB,SBLOCK,XS(B)::QAR(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
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