MESON Chess Problem Database

Problem Display
PID: 204450 (K1b3Qb/ppP1p2p/8/q1PB2np/3k1B1R/3N1P2/8/1NrR4 w - - 0 1)

van Dijk, Johannes

Midweek Sports Referee, 1925

K1b3Qb/ppP1p2p/8/q1PB2np/3k1B1R/3N1P2/8/1NrR4

#2

11 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Sxc1#
    • 1...Rxc5
      • 2.Sb4#
  • Tries
    • 1.Bxc1+?
      • 1...Se4
        • 2.Rxe4#
      • 1...Bg4!
    • 1.Bh2+?
      • 1...Bg4
        • 2.Bg1#
      • 1...Se4
        • 2.Bg1#
        • 2.Rxe4#
      • 1...Ke3!
    • 1.Bg3+?
      • 1...Bg4
        • 2.Bf2#
      • 1...Se4
        • 2.Bf2#
        • 2.Rxe4#
      • 1...Ke3!
    • 1.Ba2?
      • threat
        • 2.Qd5#
      • 1...Qxc5
        • 2.Sxc1#
      • 1...Rxb1
        • 2.Qc4#
      • 1...Rxc5
        • 2.Sb4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Be6
        • 2.Qxh8#
      • 1...Se6
        • 2.Qg1#
      • 1...Sf7
        • 2.Qg1#
      • 1...e6
        • 2.Bxg5#
      • 1...Qxa2!
    • 1.Qxh8+?
      • 1...e5
        • 2.Qxe5#
      • 1...Kxd5!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qd5#
      • 1...Qxc5
        • 2.Sxc1#
      • 1...Rxb1
        • 2.Qc4#
      • 1...Rxc5
        • 2.Sb4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Be6
        • 2.Qxh8#
      • 1...Se6
        • 2.Qg1#
      • 1...Sf7
        • 2.Qg1#
      • 1...e6
        • 2.Bxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,SBLOCK,XP(G)::R(B)+S(C),XR(a)
    • R(a);N_GUARD,SBLOCK,XP(G)::R(B)+S(C)
  • Tries
    • Try
      • B(E);CHECK,XR(a)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::R1(F),XS(d)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • B(E);CHECK
      • Vars
        • B(j);P_SPINB(j)::B(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(E);CHECK
      • Vars
        • B(j);P_SPINB(j)::B(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(H);
      • Threat
        • QAR1(K)
      • Vars
        • Q(c);N_GUARD,SBLOCK,XP(G)::R(B)+S(C),XR(a)
        • R(a);N_GUARD,XS(A)::QAR1(K)
        • R(a);N_GUARD,SBLOCK,XP(G)::R(B)+S(C)
        • R(a);N_GUARD::QAR1(K),XR(a)
        • B(j);S_CUTP(h)::QAB(K),XB(k)
        • S(d);OGATE::QAB(K)
        • P(h);S_CUTB(j)::R(F)+B(E),XS(d)
      • Refutation
        • Q(c);XB(H)
    • Try
      • Q(K);CHECK,XB(k)
      • Vars
        • P(h);P_SPINP(h)::QAB1(K),XP(h)
      • Refutation
        • K(b);P-FLIGHT,XB(H)
  • Actual
    • B(H);
    • Threat
      • QAR1(K)
    • Vars
      • Q(c);N_GUARD,SBLOCK,XP(G)::R(B)+S(C),XR(a)
      • R(a);N_GUARD,XS(A)::QAR1(K)
      • R(a);N_GUARD,SBLOCK,XP(G)::R(B)+S(C)
      • R(a);N_GUARD::QAR1(K),XR(a)
      • B(j);S_CUTP(h)::QAB(K),XB(k)
      • S(d);OGATE::QAB(K)
      • P(h);S_CUTB(j)::R(F)+B(E),XS(d)
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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).