MESON Chess Problem Database

Problem Display
PID: 104704 (8/1Kp2NpB/2R2pp1/3kp3/3pNn1Q/n1PP2P1/4PB2/8 w - - 0 1)

Riczu, Lajos

Fonyodi Jarasi TST, 1963

8/1Kp2NpB/2R2pp1/3kp3/3pNn1Q/n1PP2P1/4PB2/8

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.c4#
    • 1...Sc2
      • 2.c4#
    • 1...Sb5
      • 2.c4#
    • 1...dxc3
      • 2.Sxc3#
    • 1...f5
      • 2.Qd8#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Rc5#
      • 1...Sxd3
        • 2.Bg8#
      • 1...Se6!
    • 1.Qxf6?
      • threat
        • 2.Rc5#
        • 2.Qxe5#
        • 2.Qd8#
      • 1...gxf6
        • 2.Sxf6#
      • 1...Se6
        • 2.Qxe5#
        • 2.Qxe6#
      • 1...Sc4
        • 2.Rc5#
      • 1...Sb5
        • 2.Rc5#
        • 2.Qxe5#
        • 2.c4#
      • 1...Sxd3!
    • 1.Qh1?
      • threat
        • 2.Sxf6#
      • 1...f5
        • 2.Sf6#
      • 1...Sg2!
  • Keys
    • 1.Sd2!
      • 1...Sxe2
        • 2.Qe4#
      • 1...Sxd3
        • 2.Qe4#
      • 1...dxc3
        • 2.e4#
      • 1...Sb1
        • 2.c4#
      • 1...Sc2
        • 2.c4#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sb5
        • 2.c4#
      • 1...Sg2
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#
      • 1...e4
        • 2.dxe4#
      • 1...f5
        • 2.Qd8#
      • 1...g5
        • 2.Be4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(C)
    • P(b);XP(C)::S(F),XP(b)
    • P(f);OGATE::QAR(G)
  • Tries
    • Try
      • S(J);
      • Threat
        • R1(H)
      • Vars
        • S(c);N_GUARD,XP(D)::B(K)
      • Refutation
        • S(c);
    • Try
      • Q(G);XP(f)
      • Threat
        • DUALS(3)
      • Vars
        • P(i);XQ(G)::S(F),XP(i)
        • S(a);::R1(H)
      • Refutation
        • S(c);XP(D)
    • Try
      • Q(G);
      • Threat
        • QAB(G)+S(F),DCHECK,XP(f)
      • Vars
        • P(f);::QAB(G)+S(F),DCHECK
      • Refutation
        • S(c);
  • Actual
    • S(F);
    • Vars
      • S(c);OGATE,XP(A)::QAB1(G)
      • S(c);OGATE,XP(D)::QAB1(G)
      • P(b);N_GUARD,XP(C)::P(A)
      • S(a);N_GUARD::P(C)
      • S(a);OGATE::P(D),XS(a)
      • S(c);OGATE::QAB1(G)
      • P(e);OGATE::P(D),XP(e)
      • P(f);OGATE::QAR(G)
      • P(g);OGATE::B(K)
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