MESON Chess Problem Database

Problem Display
PID: 263297 (8/5B2/8/6pR/R3nrk1/8/1Q6/K1Bn1NN1 w - - 0 1)

Strzala, Kazimierz

Szachy, 1959

8/5B2/8/6pR/R3nrk1/8/1Q6/K1Bn1NN1

#2

8 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qg2#
  • Tries
    • 1.Sh2+?
      • 1...Kg3
        • 2.Rh3#
      • 1...Kf5!
    • 1.Se3+?
      • 1...Kg3
        • 2.Rh3#
        • 2.Qg2#
        • 2.Qh2#
      • 1...Sxe3!
    • 1.Be6+?
      • 1...Rf5
        • 2.Qe2#
      • 1...Kxh5!
    • 1.Qe2+?
      • 1...Rf3
        • 2.Qxf3#
      • 1...Kf5!
    • 1.Qg2+?
      • 1...Sg3
        • 2.Qh3#
      • 1...Kf5!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qh3#
      • 1...Kf5
        • 2.Qxf4#
      • 1...Sdf2
        • 2.Se3#
      • 1...Rf3
        • 2.Rxg5#
      • 1...Sef2
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);P_SPINS(b),SBLOCK::QAR2(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::R1(G)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • S(a);XS(C)
    • Try
      • B(H);CHECK
      • Vars
        • R(c);P_SPINR(c),P_SPINS(b)::QAB(E)
      • Refutation
        • K(d);S_FLIGHT,XR(G)
    • Try
      • Q(E);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c),P_SPINS(b)::QAB1(E),XR(c)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • S(b);P_SPINR(c),P_SPINS(b)::QAB1(E)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(d);P_SPINP(e),S_FLIGHT::QAR1(E),XR(c)
      • S(a);N_GUARD::S(C)
      • R(c);P_SPINS(b)::R1(G),XP(e)
      • S(b);P_SPINR(c)::B(H)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).