MESON Chess Problem Database

Problem Display
PID: 106214 (5rqr/2pRbpQ1/1pP1knnp/4Pp1b/2PPNp1p/7B/6N1/6K1 w - - 0 1)

Wrobel, Marian

Praca, 1952

5rqr/2pRbpQ1/1pP1knnp/4Pp1b/2PPNp1p/7B/6N1/6K1

#2

10 + 15

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qxf6#
    • 1...Bb4
      • 2.Qxf6#
    • 1...Bc5
      • 2.Qxf6#
    • 1...Bd6
      • 2.Qxf6#
    • 1...Sxe4
      • 2.d5#
    • 1...Sg4
      • 2.d5#
    • 1...Sd5
      • 2.cxd5#
    • 1...Sxd7
      • 2.d5#
    • 1...Sh7
      • 2.d5#
    • 1...Se8
      • 2.d5#
    • 1...Sxe5
      • 2.Sxf4#
  • Tries
    • 1.Sc5+?
      • 1...Bxc5
        • 2.Qxf6#
      • 1...bxc5!
    • 1.Rd6+?
      • 1...Bxd6
        • 2.Qxf6#
      • 1...cxd6!
    • 1.Rxe7+?
      • 1...Sxe7
        • 2.Sxf4#
        • 2.Qxf6#
      • 1...Kxe7!
    • 1.d5+?
      • 1...Sxd5
        • 2.cxd5#
      • 1...Kxe5!
  • Keys
    • 1.Qxh6!
      • threat
        • 2.Sg5#
      • 1...Sxe4
        • 2.Sxf4#
      • 1...Sxd7
        • 2.Sxf4#
      • 1...Sxe5
        • 2.d5#
      • 1...Sg4
        • 2.Sxf4#
      • 1...Sd5
        • 2.cxd5#
      • 1...Sh7
        • 2.Sxf4#
      • 1...Se8
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(k);N_GUARD::QAR1(J),XS(g)
    • B(k);N_GUARD,P_PINP(E)::QAR1(J),XS(g)
    • S(g);N_GUARD,XS(F)::P(E)
    • S(g);N_GUARD,N_SPINP(c)::P(E)
    • S(g);OGATE::P(D),XS(g)
    • S(g);N_GUARD,XR(I)::P(E)
    • S(g);N_GUARD::P(E)
    • S(h);N_GUARD,XP(G)::S(B),XP(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(k);P_PINP(E),XS(F)::QAR1(J),XS(g)
      • Refutation
        • P(e);XS(F)
    • Try
      • R(I);CHECK
      • Vars
        • B(k);XR(I)::QAR1(J),XS(g)
      • Refutation
        • P(j);XR(I)
    • Try
      • R(I);CHECK,XB(k)
      • Refutation
        • K(f);N_SPINP(c),P-FLIGHT,P_SPINP(l),XR(I)
    • Try
      • P(E);CHECK
      • Vars
        • S(g);OGATE,XP(E)::P(D),XS(g)
      • Refutation
        • K(f);N_SPINP(c),P-FLIGHT,P_SPINS(g),XP(G)
  • Actual
    • Q(J);XP(i)
    • Threat
      • S(F)
    • Vars
      • S(g);P_SPINS(h),XS(F)::S(B),XP(a)
      • S(g);P_SPINS(h),XR(I)::S(B),XP(a)
      • S(h);P_PINS(B),P_SPINS(g),SBLOCK,XP(G)::P(E)
      • S(g);N_SPINP(c),P_SPINS(h)::S(B),XP(a)
      • S(g);OGATE,P_SPINS(h)::P(D),XS(g)
      • S(g);P_SPINS(h)::S(B),XP(a)
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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).