MESON Chess Problem Database

Problem Display
PID: 164091 (7Q/3R2K1/3Npr2/4kp2/1P3NR1/4p1P1/2bn4/8 w - - 0 1)

Apro, Laszlo

Springaren, 1987

7Q/3R2K1/3Npr2/4kp2/1P3NR1/4p1P1/2bn4/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6+
      • 2.Kxg6#
    • 1...Rh6
      • 2.Kxh6#
    • 1...Rf7+
      • 2.Kxf7#
    • 1...Rf8
      • 2.Kxf8#
    • 1...Se4
      • 2.Sc4#
  • Tries
    • 1.Sd3+?
      • 1...Kd5
        • 2.Qa8#
      • 1...Bxd3!
    • 1.Sg6+?
      • 1...Kd5
        • 2.Qa8#
      • 1...Rxg6+!
    • 1.Sc4+?
      • 1...Ke4
        • 2.Qa8#
      • 1...Sxc4!
    • 1.Sf7+?
      • 1...Ke4
        • 2.Qa8#
      • 1...Rxf7+!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa1#
      • 1...Rg6+
        • 2.Sxg6#
      • 1...Rf7+
        • 2.Sxf7#
      • 1...Kd4
        • 2.Qa1#
      • 1...Ba4
        • 2.Sd3#
      • 1...Sb1
        • 2.Sc4#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sf3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Se4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(g);CHECK::QAB(H)+K(G),XR(g)
    • R(g);::QAB(H)+K(G),XR(g)
    • S(b);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(H)
      • Refutation
        • B(a);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(H)
      • Refutation
        • R(g);CHECK,XS(C)
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(H)
      • Refutation
        • S(b);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(H)
      • Refutation
        • R(g);CHECK,XS(E)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • R(g);CHECK,N_GUARD::S(C),XR(g)
      • R(g);CHECK,N_GUARD::S(E),XR(g)
      • K(d);S_FLIGHT::QAB(H)
      • B(a);N_GUARD::S(C)
      • S(b);N_GUARD::S(E)
      • S(b);N_GUARD::S(E),XS(b)
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