MESON Chess Problem Database

Problem Display
PID: 4698 (7n/p2N4/3p4/1Pnk4/3pR3/5Q2/5bK1/8 w - - 0 1)

Pospisil, Josef

Gazetta Letteraria, 1887

7n/p2N4/3p4/1Pnk4/3pR3/5Q2/5bK1/8

#2

5 + 7

3804 Ceske Melodie 1908
4872 Themes-64 1956
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe4
      • 2.Qb3#
    • 1...d3
      • 2.Sf6#
      • 2.Qf5#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Re1+?
      • 1...Se4
        • 2.Qb3#
      • 1...Kc4!
    • 1.Re2+?
      • 1...Se4
        • 2.Qb3#
      • 1...Kc4!
    • 1.Re7+?
      • 1...Se4
        • 2.Qb3#
      • 1...Kc4!
    • 1.Re8+?
      • 1...Se4
        • 2.Qb3#
      • 1...Kc4!
    • 1.Qh5+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc4!
    • 1.Qb3+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Sxb3!
    • 1.Qf7+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Sxe4
        • 2.Qb3#
      • 1...Sxd7
        • 2.Qc6#
      • 1...Bh4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD,P_SPINS(c),SBLOCK,XR(C)::QAB(B)
    • P(f);N_GUARD::S(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(B),XS(c)
      • Refutation
        • S(g);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(E)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • S(c);N_GUARD,SBLOCK,XR(C)::QAB(B)
      • S(c);OGATE,XS(E)::QAB1(B)
      • B(a);N_GUARD::QAR1(B),XP(b)
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