MESON Chess Problem Database

Problem Display
PID: 263245 (Q7/1p3p2/8/3ppP2/4k3/1p4K1/1N1P1R2/n1R5 w - - 0 1)

Strzala, Kazimierz

Szachy, 1984

Q7/1p3p2/8/3ppP2/4k3/1p4K1/1N1P1R2/n1R5

#2

7 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa4#
    • 1...d4
      • 2.Qxb7#
    • 1...b6
      • 2.Rc4#
  • Tries
    • 1.Rh1?
      • threat
        • 2.Rh4#
      • 1...d4
        • 2.Qxb7#
      • 1...Kd4!
    • 1.Rc4+?
      • 1...d4
        • 2.Qxb7#
      • 1...dxc4!
    • 1.Re2+?
      • 1...Kd4
        • 2.Qa4#
      • 1...Kxf5!
    • 1.Qxb7?
      • threat
        • 2.Rc4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Sc2!
    • 1.Qa7?
      • threat
        • 2.Re1#
        • 2.Qe3#
        • 2.d3#
      • 1...d4
        • 2.Qxb7#
      • 1...Sc2
        • 2.d3#
      • 1...b6!
    • 1.Qd8?
      • threat
        • 2.Qh4#
      • 1...Kd4
        • 2.Rc4#
      • 1...d4
        • 2.Re1#
      • 1...f6!
    • 1.Qe8?
      • threat
        • 2.Rf4#
      • 1...Kd4
        • 2.Qa4#
      • 1...d4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh4#
      • 1...Kd4
        • 2.Rf4#
      • 1...d4
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT,S_CUTP(d)::QAR(G)
    • P(d);OGATEB,P_SPINP(f),SBLOCK::QAB(G),XP(f)
    • P(f);P_SPINP(d)::R(A)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • P(d);OGATEB,P_SPINP(f),SBLOCK::QAB(G),XP(f)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAB(G),XP(f)
      • Refutation
        • P(d);P_SPINP(f),XR(A)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR(G)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • Q(G);P_PINP(d),XP(f)
      • Threat
        • R(A)
      • Vars
        • K(c);N_SPINP(d),P-FLIGHT,S_CUTP(d)::QAR2(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);OGATEB,SBLOCK::QAB(G),XP(f)
        • S(a);::P(C)
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(d)::R1(A)
        • P(d);::R(A)
      • Refutation
        • P(g);
    • Try
      • Q(G);P_PINP(e)
      • Threat
        • R1(D)
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT,S_CUTP(d)::QAR(G)
      • Refutation
        • P(d);
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(e)::R(D)
      • P(d);SBLOCK::QAB(G)
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