MESON Chess Problem Database

Problem Display
PID: 261519 (8/3P1R1K/4B2B/q1p1P3/Rb1rk3/3p1Np1/1N5p/1Q6 w - - 0 1)

Seneca, Camil

Neue Zurcher Zeitung, 1964

8/3P1R1K/4B2B/q1p1P3/Rb1rk3/3p1Np1/1N5p/1Q6

#2

10 + 8

5454 Near Snap 2022
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxd3#
    • 1...Rd5
      • 2.Qe1#
    • 1...Rd6
      • 2.Qe1#
    • 1...Rxd7
      • 2.Qe1#
    • 1...Be1
      • 2.Qxd3#
    • 1...Bd2
      • 2.Qxd3#
    • 1...Ba3
      • 2.Qxd3#
    • 1...Bc3
      • 2.Qxd3#
  • Tries
    • 1.Sxd3?
      • threat
        • 2.Sf2#
        • 2.Sxc5#
      • 1...c4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Rxd3!
    • 1.Sc4?
      • threat
        • 2.Sg5#
        • 2.Rf4#
      • 1...Rxd7
        • 2.Scd2#
      • 1...Qd8
        • 2.Rf4#
      • 1...Rd5
        • 2.Scd2#
        • 2.Rf4#
      • 1...Rd6
        • 2.Scd2#
        • 2.Sxd6#
        • 2.Rf4#
      • 1...Bd2
        • 2.Sd6#
      • 1...Rxc4!
    • 1.Bd5+?
      • 1...Rxd5
        • 2.Qe1#
      • 1...Kxd5!
    • 1.Bf5+?
      • 1...Kxf3
        • 2.Qf1#
      • 1...Kd5!
    • 1.Rxb4?
      • threat
        • 2.Qxd3#
        • 2.Qe1#
      • 1...cxb4
        • 2.Qe1#
      • 1...h1Q
        • 2.Qxd3#
      • 1...h1R
        • 2.Qxd3#
      • 1...Qa1
        • 2.Qxd3#
      • 1...Qa3
        • 2.Qe1#
      • 1...Qb5
        • 2.Qe1#
      • 1...Qa6
        • 2.Qe1#
      • 1...c4
        • 2.Qe1#
      • 1...Qxb4!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Rf4#
      • 1...Rxd7
        • 2.Sc3#
      • 1...Bd2
        • 2.Qb7#

Anticipated by 242725(1964)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(e);N_GUARD::QAB1(A),XP(b)
    • R(e);P_SPINB(d)::QAR(A)
    • R(e);P_PINR(I),P_SPINB(d),XP(H)::QAR(A)
    • B(d);P_SPINR(e)::QAB1(A),XP(b)
  • Tries
    • Try
      • S(B);XP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • R(e);P_SPINB(d),P_SPINR(e),XS(B)
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);P_PINR(I),S_CUTB(d),XP(H)::S(B)
        • Q(g);::R1(I)
        • B(d);S_CUTR(e)::S(B)
      • Refutation
        • R(e);XS(B)
    • Try
      • B(F);CHECK
      • Vars
        • R(e);P_SPINB(d),SBLOCK,XB(F)::QAR(A)
      • Refutation
        • K(f);N_SPINP(b),S_FLIGHT,XB(F)
    • Try
      • B(F);CHECK
      • Vars
        • K(f);N_GUARD,N_SPINP(b),S_FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • K(f);N_SPINP(b),S_FLIGHT
    • Try
      • R(D);P_PINR(e),XB(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);N_SPINR(e),XR(D)::QAR(A)
        • P(a);P_PINB(G)::QAB1(A),XP(b)
        • Q(g);::QAB1(A),XP(b)
        • Q(g);::QAR(A)
        • P(h);N_SPINR(e)::QAR(A)
      • Refutation
        • Q(g);N_SPINR(e),XR(D)
  • Actual
    • S(B);
    • Threat
      • R1(I)
    • Vars
      • R(e);P_PINR(I),P_SPINB(d),XP(H)::S(B)
      • B(d);OGATE,P_SPINR(e)::QAB(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).