MESON Chess Problem Database

Problem Display
PID: 156527 (2QR4/Bp3N2/3P2p1/3kn3/3p1pp1/1n3r2/B1P2b2/1K1R4 w - - 0 1)

Andersson, Gunnar

Die Schwalbe, 1941

2QR4/Bp3N2/3P2p1/3kn3/3p1pp1/1n3r2/B1P2b2/1K1R4

#2

9 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rxd4#
    • 1...Be1
      • 2.Rxd4#
    • 1...Bg3
      • 2.Rxd4#
    • 1...Bh4
      • 2.Rxd4#
  • Tries
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qxe5#
      • 1...Ke6!
  • Keys
    • 1.Re8!
      • threat
        • 2.Rxe5#
      • 1...Ke4
        • 2.Rxe5#
      • 1...Sxf7
        • 2.Qc5#
      • 1...Re3
        • 2.Rxd4#
      • 1...Sd3
        • 2.Bxb3#
      • 1...Sc4
        • 2.Qxb7#
      • 1...Sc6
        • 2.Qe6#
      • 1...Sd7
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(c);S_CUTB(a)::R1(B),XP(d)
    • B(a);N_GUARD::R1(B),XP(d)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(g);N_SPINP(d),N_SPINS(b),OGATE,S_FLIGHT::QAR1(H),XS(h)
      • Refutation
        • K(g);N_SPINP(d),S_FLIGHT
  • Actual
    • R(I);
    • Threat
      • R1(I),XS(h)
    • Vars
      • K(g);N_SPINP(d),N_SPINS(b),P_SPINS(h),S_FLIGHT::R1(I),XS(h)
      • S(h);XS(G)::QAR1(H)
      • R(c);S_CUTB(a)::R1(B),XP(d)
      • S(h);N_GUARD,N_SPINP(d),S_CUTR(c)::B(C),XS(b)
      • S(h);N_GUARD,N_SPINS(b),SBLOCK::QAB(H),XP(j)
      • S(h);SBLOCK::QAB1(H)
      • S(h);N_GUARD::P(D)
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