MESON Chess Problem Database

Problem Display
PID: 92309 (2N5/p3R1bR/2kn1Q1r/1pn4p/1P2P3/1N1p1B2/2p2K1B/q1rb4 w - - 0 1)

Pituk, Alexander

Schach, 1954

2N5/p3R1bR/2kn1Q1r/1pn4p/1P2P3/1N1p1B2/2p2K1B/q1rb4

#2

10 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sa5#
    • 1...Qc3
      • 2.Sa5#
    • 1...Qd4+
      • 2.Sxd4#
    • 1...Qe5
      • 2.Sa5#
    • 1...Qxf6
      • 2.Sa5#
    • 1...Qb1
      • 2.Sd4#
      • 2.Sa5#
    • 1...Qa2
      • 2.Sd4#
    • 1...Qa3
      • 2.Sd4#
    • 1...Qa4
      • 2.Sd4#
    • 1...Qa5
      • 2.Sd4#
      • 2.Sxa5#
    • 1...Qa6
      • 2.Sd4#
    • 1...Rxh7
      • 2.Qxd6#
    • 1...Bxf6
      • 2.Rc7#
    • 1...Bf8
      • 2.Rc7#
    • 1...Bh8
      • 2.Rc7#
    • 1...Sa4
      • 2.Sa5#
    • 1...Sxe4+
      • 2.Bxe4#
  • Tries
    • 1.e5+?
      • 1...Se4+
        • 2.Bxe4#
      • 1...Bxf3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxc5#
      • 1...Bd4+
        • 2.Sxd4#
      • 1...Sxe4+
        • 2.Bxe4#
      • 1...Qxc3
        • 2.Sa5#
      • 1...Bxc3
        • 2.Rc7#
      • 1...Sc4
        • 2.Rc7#
      • 1...Sb7
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::S(C)
    • Q(a);CHECK,N_GUARD::S(C),XQ(a)
    • Q(a);N_GUARD,N_SPINS(j),P_PINB(D),XQ(G)::S(C)
    • R(k);N_GUARD,XR(I)::QAR1(G),XS(j)
    • B(m);N_SPINS(j),XQ(G)::R1(H)
    • B(m);::R1(H)
    • S(g);S_CUTQ(a)::S(C)
    • S(g);CHECK,N_SPINS(j),OGATE,P_SPINS(g),XP(F)::B(D),XS(g)
  • Tries
    • Try
      • P(F);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,N_SPINS(j),P_SPINS(g)::B(D),XS(g)
      • Refutation
        • B(c);XB(D)
  • Actual
    • Q(G);N_PINS(j),P_PINS(g)
    • Threat
      • QAR1(G),XS(g)
    • Vars
      • B(m);CHECK,N_GUARD::S(C),XB(m)
      • S(j);CHECK,N_SPINS(g),OGATE,P_SPINS(j),XP(F)::B(D),XS(j)
      • Q(a);N_GUARD,N_SPINS(g),XQ(G)::S(C)
      • B(m);N_SPINS(g),XQ(G)::R1(H)
      • S(j);N_SPINS(g)::R1(H)
      • S(j);::R1(H)
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