MESON Chess Problem Database

Problem Display
PID: 138422 (4R3/KB2p3/4b3/1NrpN1Q1/Rbr1kP1p/4p2q/1nP1P2B/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

2nd Prize, Die Schwalbe, 2010

4R3/KB2p3/4b3/1NrpN1Q1/Rbr1kP1p/4p2q/1nP1P2B/8

#2

11 + 11

23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qg2#
    • 1...Qf3
      • 2.exf3#
    • 1...Sd3
      • 2.cxd3#
      • 2.exd3#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qe5#
      • 1...Sxd3
        • 2.cxd3#
      • 1...Qf5
        • 2.Qg2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Bf5!
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...Bc3
        • 2.Sxc3#
      • 1...Bf5
        • 2.Sd6#
      • 1...Sd3
        • 2.cxd3#
      • 1...Qf5!
    • 1.Sxc4?
      • threat
        • 2.Qe5#
      • 1...Qf5
        • 2.Qg2#
      • 1...Bc3
        • 2.Sd2#
        • 2.Scd6#
      • 1...Bf5
        • 2.Scd6#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sxc4!
    • 1.Sg4?
      • threat
        • 2.Qe5#
      • 1...Bf5
        • 2.Sf6#
      • 1...Sd3
        • 2.cxd3#
      • 1...Bc3!
    • 1.Sc6?
      • threat
        • 2.Qe5#
      • 1...Qf5
        • 2.Qg2#
      • 1...Bc3
        • 2.Sxc3#
      • 1...Bf5
        • 2.Sd6#
      • 1...Sd3
        • 2.cxd3#
      • 1...d4!
    • 1.Sf7?
      • threat
        • 2.Qe5#
      • 1...Bf5
        • 2.Sfd6#
      • 1...Qf5
        • 2.Qg2#
      • 1...Sd3
        • 2.cxd3#
      • 1...Bc3!
    • 1.Qg6+?
      • 1...Qf5
        • 2.Qg2#
      • 1...Bf5!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qe5#
      • 1...Bf5
        • 2.Sf6#
      • 1...Qf5
        • 2.Qg2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Sd3
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD,SBLOCK::QAB(H)
    • Q(c);OGATE::P(B),XQ(c)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • S(a);OGATE,XS(G)::P(A),XS(a)
        • Q(c);N_GUARD,SBLOCK::QAB(H)
        • B(d);N_GUARD,P_SPINR(e)::S(G),XR(h)
      • Refutation
        • B(j);
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • B(d);N_GUARD,P_SPINR(e)::S(F),XB(d)
        • B(j);S_CUTP(k)::S(F)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • Q(c);
    • Try
      • S(G);XR(e)
      • Threat
        • QAR1(H)
      • Vars
        • Q(c);N_GUARD,SBLOCK::QAB(H)
        • B(j);S_CUTP(k)::S(G)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • S(a);XS(G)
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • B(j);S_CUTP(k)::S(G)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • B(d);P_SPINR(e)
    • Try
      • S(G);N_PINP(i)
      • Threat
        • QAR1(H)
      • Vars
        • Q(c);N_GUARD,SBLOCK::QAB(H)
        • B(d);N_GUARD,P_SPINR(e)::S(F),XB(d)
        • B(j);P_SPINP(k)::S(F)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • P(i);
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • B(j);S_CUTP(k)::S(G)
        • Q(c);N_GUARD,SBLOCK::QAB(H)
        • S(a);OGATE::P(A),XS(a)
      • Refutation
        • B(d);P_SPINR(e)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c),SBLOCK::QAB(H)
      • Refutation
        • B(j);P_SPINB(j)
  • Actual
    • S(G);
    • Threat
      • QAR1(H)
    • Vars
      • B(j);S_CUTP(k)::S(G)
      • Q(c);N_GUARD,SBLOCK::QAB(H)
      • B(d);N_GUARD,P_SPINR(e)::S(G),XR(h)
      • S(a);OGATE::P(A),XS(a)
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).