MESON Chess Problem Database

Problem Display
PID: 189789 (8/rprpBn2/1R1N2Qn/2k5/p1NpP3/8/8/2K5 w - - 0 1)

Grabowski, Kazimierz

Tygodnik Illustrowany, 1912

8/rprpBn2/1R1N2Qn/2k5/p1NpP3/8/8/2K5

#2

7 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Rb5#
    • 1...d3
      • 2.Qg1#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Sxb7#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...d3
        • 2.Qg1#
      • 1...Rc6
        • 2.Rb5#
      • 1...Kxb6+!
    • 1.Sd2?
      • threat
        • 2.Sxb7#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...d3
        • 2.Qg1#
      • 1...Rc6
        • 2.Rb5#
      • 1...Kxb6+!
    • 1.Qf5+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sxf5!
    • 1.Qxf7?
      • threat
        • 2.Sxb7#
        • 2.Qd5#
      • 1...d3
        • 2.Qd5#
        • 2.Qf2#
      • 1...Sxf7!
    • 1.Qe6?
      • threat
        • 2.Sxb7#
        • 2.Qd5#
      • 1...Sxd6
        • 2.Bxd6#
        • 2.Qd5#
      • 1...d3
        • 2.Qd5#
      • 1...dxe6!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sxb7#
      • 1...Kxb6+
        • 2.Sdc4#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...d3
        • 2.Qg1#
      • 1...Rc6
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(g);SBLOCK::R1(D)
    • P(b);OGATEB::QAB(F)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(G)+S(E),DCHECK,XP(f)
      • Vars
        • S(i);OGATE,P_SPINS(i),XS(E)::QAB1(F),XS(i)
        • P(b);OGATEB::QAB(F)
        • R(g);SBLOCK::R1(D)
      • Refutation
        • K(c);CHECK,S_FLIGHT,XR(D)
    • Try
      • S(B);
      • Threat
        • B(G)+S(E),DCHECK,XP(f)
      • Vars
        • S(i);OGATE,P_SPINS(i),XS(E)::QAB1(F),XS(i)
        • P(b);OGATEB::QAB(F)
        • R(g);SBLOCK::R1(D)
      • Refutation
        • K(c);CHECK,S_FLIGHT,XR(D)
    • Try
      • Q(F);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(F),XS(i)
      • Refutation
        • S(d);XQ(F)
    • Try
      • Q(F);XS(i)
      • Threat
        • DUALS(2)
      • Refutation
        • S(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(F)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • S(B);
    • Threat
      • B(G)+S(E),DCHECK,XP(f)
    • Vars
      • K(c);CHECK,S_FLIGHT,XR(D)::QAR(F)+S(E),DCHECK
      • S(i);OGATE,P_SPINS(i),XS(E)::QAB1(F),XS(i)
      • P(b);OGATEB::QAB(F)
      • R(g);SBLOCK::R1(D)
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