MESON Chess Problem Database

Problem Display
PID: 16755 (2Q5/1bn1rN2/5r1p/pN1k2q1/K1R2n2/BPp2R2/1b2B3/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Abo Underrattelsers Schacktidning, 1943

2Q5/1bn1rN2/5r1p/pN1k2q1/K1R2n2/BPp2R2/1b2B3/8

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Rd4#
    • 1...Rxe2
      • 2.Sxc7#
    • 1...Re3
      • 2.Sxc7#
    • 1...Re4
      • 2.Sxc7#
    • 1...Re5
      • 2.Sxc7#
    • 1...Re6
      • 2.Sxc7#
    • 1...Re8
      • 2.Sxc7#
    • 1...Bc1
      • 2.Sxc3#
    • 1...Bxa3
      • 2.Sxc3#
    • 1...Bc6
      • 2.Rd4#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sh3
      • 2.Rd3#
    • 1...Sh5
      • 2.Rd3#
    • 1...Sfe6
      • 2.Qxb7#
    • 1...Sg6
      • 2.Rd3#
    • 1...Sa6
      • 2.Rd4#
    • 1...Sa8
      • 2.Rd4#
    • 1...Se8
      • 2.Rd4#
  • Tries
    • 1.Qxb7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Ke6!
    • 1.Qd7+?
      • 1...Rd6
        • 2.Sxc7#
        • 2.Rd4#
        • 2.Qxd6#
      • 1...Rxd7!
    • 1.Qd8+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rd7
        • 2.Sxc7#
      • 1...Ke6!
  • Keys
    • 1.Re3!
      • threat
        • 2.Rc5#
      • 1...Rxe3
        • 2.Sxc7#
      • 1...Bxa3
        • 2.Sxc3#
      • 1...Sxb5
        • 2.Qc5#
      • 1...Rc6
        • 2.Rd4#
      • 1...Re4
        • 2.Sxc7#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Sfe6
        • 2.Qxb7#
      • 1...Sa6
        • 2.Rd4#
      • 1...Sce6
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(g);SBLOCK::R1(F)
    • R(k);N_GUARD,XB(A)::S(G),XS(j)
    • R(k);N_GUARD::S(G),XS(j)
    • R(k);N_GUARD,P_PINR(F)::S(G),XS(j)
    • B(a);N_GUARD::S(G),XP(b)
    • B(a);N_GUARD,XB(B)::S(G),XP(b)
    • B(i);P_PINS(G),SBLOCK::R1(F)
    • S(c);N_GUARD::R(D)
    • S(c);N_GUARD::R(D),XS(c)
    • S(c);SBLOCK,S_CUTR(g)::QAB(I),XB(i)
    • S(j);::R1(F)
  • Tries
    • Try
      • Q(I);CHECK,XB(i)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAB1(I),XR(g)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(I);CHECK
      • Refutation
        • R(k);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(I),XR(g)
        • R(k);P_SPINR(k)::S(G),XS(j)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • R1(F)
    • Vars
      • R(k);N_GUARD,XR(D)::S(G),XS(j)
      • B(a);N_GUARD,XB(B)::S(G),XP(b)
      • S(j);OGATE,XS(G)::QAR1(I)
      • R(g);SBLOCK::R1(F)
      • R(k);N_GUARD,P_PINR(F)::S(G),XS(j)
      • S(c);N_GUARD::R(D),XS(c)
      • S(c);S_CUTR(g)::QAB(I),XB(i)
      • S(j);::R1(F)
      • S(j);S_CUTR(k)::B(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).