MESON Chess Problem Database

Problem Display
PID: 17852 (3R1Q2/7B/5N2/KP1N4/P1Pk4/3PRq2/8/3r2B1 w - - 0 1)

Fleck, Ferenc

4th HM., Magasinet, 1951

3R1Q2/7B/5N2/KP1N4/P1Pk4/3PRq2/8/3r2B1

#2

12 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Re1#
    • 1...Rxd3
      • 2.Re4#
  • Tries
    • 1.Sc3+?
      • 1...Qd5
        • 2.Se2#
      • 1...Kxc3!
    • 1.Sf4+?
      • 1...Qd5
        • 2.Se2#
      • 1...Kc3!
    • 1.Re1+?
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qe3!
    • 1.Rxf3+?
      • 1...Ke5
        • 2.Re8#
        • 2.Qd6#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Rxg1!
    • 1.Re6+?
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qe3
        • 2.Bxe3#
      • 1...Rxg1!
    • 1.Re7+?
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qe3
        • 2.Bxe3#
      • 1...Rxg1!
    • 1.Ree8+?
      • 1...Qf2
        • 2.Bxf2#
      • 1...Qe3
        • 2.Bxe3#
      • 1...Rxg1!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qa7#
      • 1...Kc5
        • 2.Qa7#
      • 1...Qxd5
        • 2.Se4#
      • 1...Qxe3
        • 2.Sd7#
      • 1...Qxf6
        • 2.Re1#
      • 1...Rxd3
        • 2.Re4#
      • 1...Qe4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::B(A)+R(C)
    • R(a);SBLOCK,XP(B)::B(A)+R(C),DCHECK
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_PINP(G),P_SPINQ(b)::S(H)
      • Refutation
        • K(c);S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_PINP(G),P_SPINQ(b)::S(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(A),XQ(b)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • R(C);CHECK,XQ(b)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(A),XQ(b)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(A),XQ(b)
      • Refutation
        • R(a);XB(A)
    • Try
      • R(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(A),XQ(b)
      • Refutation
        • R(a);XB(A)
  • Actual
    • Q(L);
    • Threat
      • QAB(L)
    • Vars
      • K(c);S_FLIGHT::QAB(L)
      • Q(b);N_GUARD,P_PINP(G),P_SPINQ(b),XS(H)::QAB(L)+S(I)
      • Q(b);N_GUARD,P_SPINQ(b),XR(C)::QAB(L)+S(I)
      • Q(b);N_GUARD,P_SPINQ(b),XS(I)::B(A)+R(C)
      • R(a);SBLOCK,XP(B)::B(A)+R(C),DCHECK
      • Q(b);N_GUARD::QAB(L)+S(I),XQ(b)
HTML5 logo

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).