MESON Chess Problem Database

Problem Display
PID: 124391 (8/1P6/BK2p3/R1pkP2R/1p2n3/3b4/1qNQ4/2n3B1 w - - 0 1)

Siklosi, Pal

Pedagogusok Lapja, 1984

8/1P6/BK2p3/R1pkP2R/1p2n3/3b4/1qNQ4/2n3B1

#2

9 + 8

731 Canadian Chess Chat 1984
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sxb4#
    • 1...Qa2
      • 2.Sxb4#
    • 1...Sb3
      • 2.Sxb4#
    • 1...b3
      • 2.Sb4#
  • Tries
    • 1.Qxd3+?
      • 1...Qd4
        • 2.Se3#
        • 2.Sxb4#
        • 2.Bc4#
        • 2.Qxd4#
      • 1...Sxd3!
  • Keys
    • 1.Qxb4!
      • threat
        • 2.Se3#
      • 1...Qxb4+
        • 2.Sxb4#
      • 1...Qxe5
        • 2.Qd4#
      • 1...Qxc2
        • 2.Qd4#
      • 1...Bxc2
        • 2.Bc4#
      • 1...Sg5
        • 2.Rxc5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Bc4
        • 2.Bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::S(B),XP(d)
    • S(a);S_CUTQ(b)::S(B),XP(d)
    • P(d);S_CUTQ(b)::S(B)
  • Tries
    • Try
      • Q(C);CHECK,XB(c)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);N_PINB(c),P_SPINQ(C),XP(d)
    • Threat
      • S(B)
    • Vars
      • Q(b);CHECK,XQ(C)::S(B),XQ(b)
      • Q(b);N_PINQ(C),P_SPINQ(b),XP(E)::QAR1(C)
      • Q(b);N_PINQ(C),XS(B)::QAR1(C)
      • B(c);N_GUARD,XS(B)::B(G)
      • S(e);N_GUARD::R1(D),XP(f)
      • Q(b);N_PINQ(C)::QAR1(C),XQ(b)
      • B(c);N_GUARD::B(G),XB(c)
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