MESON Chess Problem Database

Problem Display
PID: 149889 (R2bb3/r4R1N/Bp2Qp1n/3P1q1p/p5kB/6P1/2N3P1/1K4n1 w - - 0 1)

Feldmann, Tibor (aka Florian, Tibor)

HM., Die Schwalbe, 1934/III

R2bb3/r4R1N/Bp2Qp1n/3P1q1p/p5kB/6P1/2N3P1/1K4n1

#2

11 + 11

133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Sxf6#
    • 1...Bc7
      • 2.Sxf6#
    • 1...Bd7
      • 2.Rg7#
    • 1...Se2
      • 2.Bxe2#
    • 1...Sh3
      • 2.Be2#
  • Tries
    • 1.Be2+?
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sxe2!
    • 1.Rg7+?
      • 1...Bg6
        • 2.Rxg6#
      • 1...Rxg7!
    • 1.Qe4+?
      • 1...Qf4
        • 2.Se3#
        • 2.Qxf4#
      • 1...Qxe4!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Qe4#
      • 1...Qxe6
        • 2.Se3#
      • 1...Rd7
        • 2.Rxa4#
      • 1...Re7
        • 2.Sxf6#
      • 1...Bc7
        • 2.Sxf6#
      • 1...Bd7
        • 2.Rg7#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sh3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(i);S_CUTB(j)::S(J),XP(g)
    • B(j);N_GUARD::S(J),XP(g)
    • B(k);N_GUARD,S_CUTR(i)::R(I)
    • S(a);N_GUARD::B(G),XS(a)
    • S(a);N_GUARD::B(G)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(G),XS(a)
      • Refutation
        • S(a);XB(G)
    • Try
      • R(I);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::R(I),XB(k)
      • Refutation
        • R(i);XR(I)
    • Try
      • Q(H);CHECK,N_PINQ(d),N_SPINS(B)
      • Refutation
        • Q(d);P_PINS(B),XQ(H)
  • Actual
    • B(G);
    • Threat
      • QAR2(H)
    • Vars
      • Q(d);N_PINS(B),XQ(H)::S(B)
      • R(i);OGATE::R(K),XP(b)
      • R(i);S_CUTB(j)::S(J),XP(g)
      • B(j);N_GUARD::S(J),XP(g)
      • B(k);N_GUARD,S_CUTR(i)::R(I)
      • S(a);N_GUARD::QAB(H),XS(a)
      • S(a);N_GUARD::QAB(H)
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