MESON Chess Problem Database

Problem Display
PID: 88906 (2n2Q1r/1KB5/n1R1P3/1p1kP3/p2P2p1/6Np/3R4/8 w - - 0 1)

Moutecidis, Pavlos

Sorokin, Evgeny Pavlovich

Buletin Problemistic, 1970

2n2Q1r/1KB5/n1R1P3/1p1kP3/p2P2p1/6Np/3R4/8

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qc5#
    • 1...Sc5+
      • 2.Qxc5#
    • 1...Sxc7
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sb6
      • 2.Qd6#
    • 1...Sd6+
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qh1#
      • 1...Sc5+
        • 2.dxc5#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Rf8!
    • 1.Qf4?
      • threat
        • 2.Qe4#
      • 1...Sc5+
        • 2.dxc5#
      • 1...Sd6+!
    • 1.Qd8+?
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Rxd8!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe4#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sd6+
        • 2.exd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • S(f);N_GUARD::QAR1(I)
    • S(f);CHECK,N_GUARD::QAR1(I),XS(f)
    • S(f);N_GUARD,XB(H)::QAR1(I)
    • S(g);N_GUARD::QAR1(I)
    • S(g);CHECK,N_GUARD::QAR1(I),XS(g)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB(I)
      • Vars
        • S(f);CHECK,OGATE::R(A)+P(C),XS(f)
        • S(g);CHECK,N_GUARD::R1(E),XS(g)
      • Refutation
        • R(h);
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • S(f);CHECK,OGATE::R(A)+P(C),XS(f)
      • Refutation
        • S(g);CHECK
    • Try
      • Q(I);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINS(g)::QAR1(I),XS(g)
      • Refutation
        • R(h);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • S(f);CHECK,N_GUARD::R1(E),XS(f)
      • S(g);CHECK,OGATE::QAR(I)+P(D),XS(g)
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