MESON Chess Problem Database

Problem Display
PID: 260582 (n1BRR3/2P1N1p1/1QppN1P1/n3kp1K/3pp2B/2P1bp2/7P/q4b2 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

64 Shakhmatnoe obozrenie, 2022

n1BRR3/2P1N1p1/1QppN1P1/n3kp1K/3pp2B/2P1bp2/7P/q4b2

#2

12 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qxd4#
    • 1...Bd2
      • 2.Qxd4#
    • 1...Bf4
      • 2.Qxd4#
    • 1...Bg5
      • 2.Qxd4#
    • 1...Bh6
      • 2.Qxd4#
    • 1...c5
      • 2.Qxd6#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sed5#
      • 1...Kxf4
        • 2.Bg3#
      • 1...Bxf4
        • 2.Qxd4#
      • 1...d5
        • 2.Sexd5#
      • 1...Sxc7!
    • 1.Sxc6+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Sxc6!
    • 1.Bg3+?
      • 1...Kf6
        • 2.Sg8#
      • 1...Bf4
        • 2.Qxd4#
      • 1...f4!
    • 1.Rf8?
      • threat
        • 2.Rxf5#
      • 1...f4
        • 2.Rf5#
      • 1...Bh3!
    • 1.Qc5+?
      • 1...d5
        • 2.Qd6#
      • 1...dxc5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sef4#
      • 1...Kxd5
        • 2.Qc5#
      • 1...Sxc7
        • 2.Sexc7#
      • 1...cxd5
        • 2.Qxd6#
      • 1...f4
        • 2.Sexf4#
      • 1...Bf4
        • 2.Sexf4#
        • 2.Qxd4#
      • 1...Bg5
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • B(c);N_GUARD::QAB1(E),XP(e)
    • P(j);OGATE::QAB1(E),XP(k)
  • Tries
    • Try
      • S(F);
      • Threat
        • R(L)+S(I)
      • Vars
        • K(h);OGATEB,S_FLIGHT,XS(F)::B(C)
        • B(c);N_GUARD,SBLOCK,XS(F)::QAB1(E),XP(e)
        • P(k);::R(L)+S(I),XP(k)
      • Refutation
        • S(m);XP(H)
    • Try
      • S(I);CHECK,XP(j)
      • Vars
        • K(h);P-FLIGHT,P_SPINP(k)::QAR1(E)
      • Refutation
        • S(g);XS(I)
    • Try
      • B(C);CHECK
      • Vars
        • K(h);N_GUARD,S_CUTB(c),S_CUTP(i),S_FLIGHT::S(I)
        • B(c);P_SPINB(c)::QAB1(E),XP(e)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • R(L);
      • Threat
        • R1(L),XP(i)
      • Vars
        • P(i);::R1(L)
      • Refutation
        • B(b);
    • Try
      • Q(E);CHECK
      • Vars
        • P(k);P_SPINP(k)::QAB1(E)
      • Refutation
        • P(k);XQ(E)
  • Actual
    • S(I);
    • Threat
      • R(L)+S(F)
    • Vars
      • K(h);OGATEB,P-FLIGHT,P_SPINP(k),XS(I)::QAR1(E)
      • S(m);XP(H)::R(L)+S(F),XS(m)
      • P(j);OGATE,XS(I)::QAB1(E),XP(k)
      • P(i);::R(L)+S(F),XP(i)
      • B(c);N_GUARD::QAB1(E),XP(e)
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).