MESON Chess Problem Database

Problem Display
PID: 78889 (3R4/3N4/2Q1B3/p1p2p2/2p3N1/1n1kpR2/1p1rp1K1/1bbrB3 w - - 0 1)

Pituk, Alexander

Praca, 1948

3R4/3N4/2Q1B3/p1p2p2/2p3N1/1n1kpR2/1p1rp1K1/1bbrB3

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Sxc5#
      • 2.Sde5#
  • Tries
    • 1.Rxe3+?
      • 1...Kd4
        • 2.Sxc5#
        • 2.Sde5#
        • 2.Sb6#
        • 2.Sdf6#
        • 2.Sb8#
        • 2.Sf8#
        • 2.Qd5#
        • 2.Qd6#
      • 1...Kc2!
    • 1.Qe4+?
      • 1...Kc3
        • 2.Qxc4#
      • 1...Kxe4
        • 2.Sdf6#
      • 1...fxe4!
    • 1.Qb5?
      • threat
        • 2.Qxc4#
      • 1...Kc2
        • 2.Qxc4#
      • 1...Kc3
        • 2.Qxc4#
      • 1...Kd4
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sdf6#
      • 1...Rc2
        • 2.Sxc5#
      • 1...Sd4!
    • 1.Qd5+?
      • 1...Kc2
        • 2.Qxc4#
      • 1...Kc3
        • 2.Qxc4#
      • 1...Sd4!
    • 1.Qa6?
      • threat
        • 2.Qxc4#
      • 1...Kc2
        • 2.Qxc4#
      • 1...Kc3
        • 2.Qxc4#
      • 1...Kd4
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sdf6#
      • 1...Rc2
        • 2.Sxc5#
      • 1...Sd4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qxc4#
      • 1...Kc2
        • 2.Qxc4#
      • 1...Kc3
        • 2.Qxc4#
      • 1...Kd4
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sdf6#
      • 1...Rc2
        • 2.Sxc5#
      • 1...Sd4
        • 2.Rxe3#
      • 1...c3
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,XP(i)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINR(e)::QAR1(E),XP(j)
        • K(h);N_SPINP(i),S_FLIGHT,XQ(E)::S(G)
      • Refutation
        • P(m);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E),XP(j)
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::QAR2(E),XP(j)
        • K(h);P-FLIGHT,P_SPINR(e)::QAR1(E),XP(j)
        • K(h);N_SPINP(i),P-FLIGHT::QAR1(E),XP(j)
        • K(h);N_SPINP(i),S_FLIGHT::S(G)
        • R(e);SBLOCK::R(H)+S(G),DCHECK,XP(l)
      • Refutation
        • S(g);
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::QAR2(E),XP(j)
        • K(h);P-FLIGHT,P_SPINR(e)::QAR1(E),XP(j)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(E);
      • Threat
        • QAB1(E),XP(j)
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::QAR2(E),XP(j)
        • K(h);P-FLIGHT,P_SPINR(e)::QAR1(E),XP(j)
        • K(h);N_SPINP(i),P-FLIGHT::QAR1(E),XP(j)
        • K(h);N_SPINP(i),S_FLIGHT::S(G)
        • R(e);SBLOCK::R(H)+S(G),DCHECK,XP(l)
      • Refutation
        • S(g);
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XP(j)
    • Vars
      • K(h);N_SPINP(i),P_SPINS(g),S_FLIGHT::QAR2(E),XP(j)
      • K(h);P-FLIGHT,P_SPINR(e)::QAR1(E),XP(j)
      • K(h);N_SPINP(i),P-FLIGHT,P_SPINP(j)::QAR1(E),XP(j)
      • K(h);N_SPINP(i),P_SPINP(j),S_FLIGHT::S(G)
      • R(e);SBLOCK::R(H)+S(G),DCHECK,XP(l)
      • S(g);SBLOCK::R1(C),XP(i)
      • P(j);SBLOCK::B(F),XP(m)
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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).