MESON Chess Problem Database

Problem Display
PID: 84621 (Kn2b2b/2Pr1p2/3P3R/3N1k2/1R2N1pP/n4qP1/5Q2/BB2r3 w - - 0 1)

Szwedowski, Leopold Mieczyslaw

2nd Prize, diagrammes, 1974

Kn2b2b/2Pr1p2/3P3R/3N1k2/1R2N1pP/n4qP1/5Q2/BB2r3

#2

12 + 10

6490 yacpdb 2009
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Rxb1
      • 2.Se3#
    • 1...Rc1
      • 2.Se3#
    • 1...Rd1
      • 2.Se3#
    • 1...Rf1
      • 2.Se3#
    • 1...Rg1
      • 2.Se3#
    • 1...Rh1
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Rxe4
      • 2.Se3#
      • 2.Bxe4#
    • 1...Rxd6
      • 2.Sxd6#
      • 2.Se7#
    • 1...Re7
      • 2.Sxe7#
    • 1...Rd8
      • 2.Se7#
    • 1...Bf6
      • 2.Rxf6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Qxe4
        • 2.Qf2#
      • 1...Qxg3
        • 2.Sxg3#
      • 1...Bf6
        • 2.Rxf6#
      • 1...f6
        • 2.Sf4#
      • 1...Qe3
        • 2.Sxe3#
        • 2.Se7#
      • 1...Re3
        • 2.Sxe3#
        • 2.Se7#
      • 1...Re7
        • 2.Se3#
        • 2.Sxe7#
      • 1...Be5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rh5#
      • 1...Qxe4+
        • 2.Sd5#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Bf6
        • 2.Rxf6#
      • 1...f6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(c);OGATE::QAR1(C),XQ(c)
    • R(a);N_GUARD,XB(B)::S(H)
    • R(a);N_GUARD::S(H)
    • R(a);N_GUARD::S(H),XR(a)
    • R(f);N_GUARD::S(H),XR(f)
    • R(f);N_GUARD::S(H)
    • B(j);N_GUARD::R1(J),XB(j)
  • Tries
    • Try
      • Q(C);N_PINQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATEB,P_PINS(H),P_SPINQ(c),XS(F)::QAR(C)
        • Q(c);XP(D)::B(B)+S(F),DCHECK,XQ(c)
        • B(j);N_GUARD::R1(J),XB(j)
        • P(g);S_CUTB(j)::QAR(C)+S(H)
      • Refutation
        • B(j);
  • Actual
    • S(H);N_PINQ(c),P_SPINS(F)
    • Threat
      • R(J)
    • Vars
      • Q(c);CHECK,P_SPINQ(c),XS(F)::QAR(C)+S(H)
      • Q(c);N_PINS(F),OGATE,P_SPINQ(c),XS(H)::QAR1(C),XQ(c)
      • B(j);N_GUARD::R1(J),XB(j)
      • P(g);S_CUTB(j)::QAR(C)
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