MESON Chess Problem Database

Problem Display
PID: 271220 (K7/2N3p1/7b/2pRB3/p1k1p3/P5rr/P2PP3/4Q2b w - - 0 1)

Seidemann, Felix

Die Schwalbe, 1932

K7/2N3p1/7b/2pRB3/p1k1p3/P5rr/P2PP3/4Q2b

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qc1#
    • 1...Be3
      • 2.Qc1#
    • 1...e3
      • 2.Qc1#
      • 2.d3#
  • Tries
    • 1.d3+?
      • 1...exd3
        • 2.Qc3#
      • 1...Rxd3!
    • 1.e3?
      • threat
        • 2.Qc1#
        • 2.Qf1#
        • 2.Qe2#
      • 1...Rg1
        • 2.Qe2#
      • 1...Rg2
        • 2.Qc1#
      • 1...Rf3
        • 2.Qc1#
        • 2.Qe2#
      • 1...Rh2
        • 2.Qc1#
      • 1...Bg2
        • 2.Qc1#
        • 2.Qe2#
      • 1...Bf3
        • 2.Qc1#
      • 1...Rxe3!
  • Keys
    • 1.d4!
      • threat
        • 2.Rxc5#
      • 1...cxd4
        • 2.Qb4#
      • 1...exd4 ep
        • 2.Qc3#
      • 1...e3
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);S_CUTR(b)::QAR(A)
    • B(h);S_CUTR(b)::QAR(A)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • P(f);P_PINR(F),XP(C)::QAR1(A)
      • Refutation
        • R(b);XP(C)
    • Try
      • P(D);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::QAB(A)
        • R(b);::QAR(A)
        • R(c);::QAR(A)
        • B(a);::QAR(A)
      • Refutation
        • R(b);XP(D)
  • Actual
    • P(C);
    • Threat
      • R1(F),XP(g)
    • Vars
      • P(g);N_GUARD,XP(C)::QAR1(A)
      • P(f);EP,P_PINR(F),S_CUTR(b),XP(C)::QAR1(A)
      • P(f);P_PINR(F),S_CUTB(h),S_CUTR(b)::QAR(A)
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