MESON Chess Problem Database

Problem Display
PID: 89951 (2K5/1R1pb2p/n2R2Br/1N6/2k1pp1r/1pPp2P1/1q1p4/3Q2B1 w - - 0 1)

Martin, Ernst Otto

Die Schwalbe, 1925

2K5/1R1pb2p/n2R2Br/1N6/2k1pp1r/1pPp2P1/1q1p4/3Q2B1

#2

9 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Sa3#
    • 1...Bf6
      • 2.Bf7#
    • 1...Sc5
      • 2.Rd4#
  • Tries
    • 1.Sa3+?
      • 1...Kxc3
        • 2.Bd4#
      • 1...Qxa3!
    • 1.Ba7?
      • threat
        • 2.Rd4#
      • 1...Qxc3
        • 2.Sa3#
      • 1...Bf6
        • 2.Bf7#
      • 1...Bxd6!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe4#
      • 1...Qxc3
        • 2.Sa3#
      • 1...exf3
        • 2.Bxd3#
      • 1...fxg3
        • 2.Qf7#
      • 1...e3
        • 2.Qd5#
      • 1...Bf6
        • 2.Bf7#
      • 1...Sc5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD,SBLOCK,XP(C)::S(E)
    • B(l);S_CUTR(j)::B(G)
    • S(i);SBLOCK::R1(F)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(C)::B(B)
      • Refutation
        • Q(a);XS(E)
    • Try
      • B(B);
      • Threat
        • R1(F)
      • Vars
        • Q(a);N_GUARD,SBLOCK,XP(C)::S(E)
        • B(l);S_CUTR(j)::B(G)
      • Refutation
        • B(l);XR(F)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A),XP(f)
    • Vars
      • Q(a);N_GUARD,SBLOCK,XP(C)::S(E)
      • P(f);OGATE,XQ(A)::B(G),XP(d)
      • P(g);OGATE,XP(D)::QAB(A)
      • P(f);OGATE::QAB1(A)
      • B(l);S_CUTR(j)::B(G)
      • S(i);SBLOCK::R1(F)
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