MESON Chess Problem Database

Problem Display
PID: 138679 (2nKb3/8/Ppk1p3/1p2Pp2/NRp1p3/4N3/8/1Q1R1B2 w - - 0 1)

Fjellstrom, Zakarias

4th Prize, BCF 119. Ty., 1968-1969

2nKb3/8/Ppk1p3/1p2Pp2/NRp1p3/4N3/8/1Q1R1B2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sa7
      • 2.Rd6#
    • 1...Se7
      • 2.Rd6#
    • 1...c3
      • 2.Bxb5#
    • 1...bxa4
      • 2.Rxc4#
    • 1...f4
      • 2.Qxe4#
  • Tries
    • 1.Kxc8?
      • threat
        • 2.Rd6#
      • 1...bxa4
        • 2.Rxc4#
      • 1...Bd7+!
    • 1.Sxf5?
      • threat
        • 2.Qxe4#
      • 1...bxa4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Se7#
        • 2.Rxd6#
      • 1...Se7
        • 2.Sxe7#
        • 2.Rd6#
      • 1...e3
        • 2.Bg2#
        • 2.Qe4#
      • 1...exf5!
    • 1.Bxc4?
      • threat
        • 2.Bxb5#
      • 1...bxc4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sa7
        • 2.Rd6#
      • 1...bxa4!
  • Keys
    • 1.Qd3!
      • 1...cxd3
        • 2.Rc1#
      • 1...exd3
        • 2.Bg2#
      • 1...bxa4
        • 2.Qxc4#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Se7
        • 2.Qd6#
      • 1...c3
        • 2.Qxb5#
        • 2.Qxc3#
      • 1...f4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD::R1(B),XS(h)
    • S(h);N_GUARD::R1(B)
    • P(a);OGATE::B(C),XP(c)
    • P(c);N_GUARD,XS(E)::R(F),XP(a)
    • P(d);N_GUARD::QAB(A),XP(b)
  • Tries
    • Try
      • K(I);P-FLIGHT,XS(h)
      • Threat
        • R1(B)
      • Vars
        • P(c);N_GUARD,XS(E)::R(F),XP(a)
      • Refutation
        • B(i);CHECK
    • Try
      • S(D);XP(d)
      • Threat
        • QAB(A),XP(b)
      • Vars
        • P(c);N_GUARD,XS(E)::R(F),XP(a)
      • Refutation
        • P(g);XS(D)
    • Try
      • B(C);XP(a)
      • Threat
        • B(C),XP(c)
      • Vars
        • P(c);OGATE,XB(C)::R(F),XP(c)
        • S(h);N_GUARD::R1(B),XS(h)
        • S(h);N_GUARD::R1(B)
      • Refutation
        • P(c);XS(E)
  • Actual
    • Q(A);
    • Vars
      • P(a);OGATEB,XQ(A)::R(B)
      • P(b);OGATEB,XQ(A)::B(C)
      • P(c);N_GUARD,XS(E)::QAR2(A),XP(a)
      • B(i);N_GUARD::QAB1(A)
      • B(i);N_GUARD::QAB1(A),XB(i)
      • S(h);N_GUARD::QAR1(A),XS(h)
      • S(h);N_GUARD::QAR1(A)
      • P(d);N_GUARD::QAB(A),XP(b)
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