MESON Chess Problem Database

Problem Display
PID: 109445 (b1r5/3Q4/p7/8/2k1N3/K1P4R/5p2/3n1q2 w - - 0 1)

Strzala, Kazimierz

Szachy, 1965

b1r5/3Q4/p7/8/2k1N3/K1P4R/5p2/3n1q2

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qd3#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qe1
      • 2.Qd3#
    • 1...Qg1
      • 2.Qd3#
    • 1...Qh1
      • 2.Qd3#
    • 1...Rc5
      • 2.Sd2#
    • 1...Bd5
      • 2.Qa4#
    • 1...Sxc3
      • 2.Rxc3#
  • Tries
    • 1.Sd6+?
      • 1...Kd5
        • 2.Rh5#
      • 1...Kc5!
    • 1.Qe6+?
      • 1...Bd5
        • 2.Qxa6#
      • 1...Kb5!
    • 1.Qxc8+?
      • 1...Kb5
        • 2.Qc5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Kd5!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Qd4#
      • 1...Sxc3
        • 2.Sd2#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Qd3
        • 2.Qa4#
      • 1...Rc5
        • 2.Rxc5#
      • 1...Rd8
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::QAB1(E)
    • Q(b);N_GUARD,P_PINP(B)::QAB1(E),XQ(b)
    • R(g);SBLOCK::S(D)
    • B(f);SBLOCK::QAR2(E)
    • S(a);OGATE,XP(B)::R1(C),XS(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);S_FLIGHT::R(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • B(f);P_SPINB(f),SBLOCK::QAB(E),XP(e)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK,XR(g)
      • Vars
        • K(d);S_FLIGHT::QAR1(E)
        • B(f);N_GUARD,P_SPINB(f)::QAR2(E),XB(f)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAR1(E)
    • Vars
      • S(a);SBLOCK,XP(B)::S(D)
      • B(f);N_GUARD::QAB1(E),XB(f)
      • Q(b);P_PINP(B),SBLOCK::QAR2(E)
      • R(g);N_GUARD::R1(C),XR(g)
      • R(g);N_GUARD::R1(C)
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