MESON Chess Problem Database

Problem Display
PID: 156719 (1q2r2B/8/Bb1P2Q1/8/K1N1p2p/P2k2p1/R5nR/1N1r1b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1954

1q2r2B/8/Bb1P2Q1/8/K1N1p2p/P2k2p1/R5nR/1N1r1b2

#2

10 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb1
      • 2.Rd2#
    • 1...Rc1
      • 2.Rd2#
    • 1...Re1
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
    • 1...Be3
      • 2.Sb6#
    • 1...Se3
      • 2.Sb2#
  • Tries
    • 1.Qxg3+?
      • 1...Be3
        • 2.Sb6#
      • 1...Se3
        • 2.Sb2#
        • 2.Scd2#
        • 2.Sxe3#
        • 2.Sa5#
        • 2.Sxb6#
      • 1...e3
        • 2.Scd2#
      • 1...hxg3!
    • 1.Qg4?
      • threat
        • 2.Qxd1#
      • 1...Rxb1
        • 2.Rd2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Re1
        • 2.Rd2#
      • 1...Rd2
        • 2.Rxd2#
      • 1...Be2
        • 2.Qxe2#
      • 1...Be3
        • 2.Sb6#
      • 1...Se3
        • 2.Sb2#
      • 1...e3
        • 2.Scd2#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sxb6#
      • 1...Ba5!
    • 1.Qf6?
      • threat
        • 2.Qc3#
      • 1...Rd2
        • 2.Rxd2#
      • 1...e3
        • 2.Scd2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ba5
        • 2.Qd4#
      • 1...Re5!
    • 1.Qg7?
      • threat
        • 2.Qc3#
      • 1...Rd2
        • 2.Rxd2#
      • 1...e3
        • 2.Scd2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ba5
        • 2.Qd4#
      • 1...Re5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxd1#
      • 1...Rxb1
        • 2.Rd2#
      • 1...e3
        • 2.Scd2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Re1
        • 2.Rd2#
      • 1...Rd2
        • 2.Rxd2#
      • 1...Be2
        • 2.Qxe2#
      • 1...Be3
        • 2.Sb6#
      • 1...Ba5
        • 2.Qd5#
      • 1...Se3
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,XS(A)::R1(B)
    • R(a);N_GUARD::R1(B)
    • R(a);N_GUARD::R1(B),XR(a)
    • B(h);SBLOCK::B(G)+S(F)
    • S(c);SBLOCK::B(G)+S(F),DCHECK
  • Tries
    • Try
      • Q(I);CHECK,N_PINP(f),XP(e)
      • Vars
        • B(h);P_SPINB(h)::B(G)+S(F)
        • P(f);P_SPINP(f)::B(G)+S(F)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);N_PINP(f)
      • Threat
        • QAR2(I),XR(a)
      • Vars
        • R(a);N_GUARD,XS(A)::R1(B)
        • R(a);N_GUARD::R1(B)
        • R(a);N_GUARD::R1(B),XR(a)
        • B(b);N_GUARD::QAB1(I),XB(b)
        • B(h);SBLOCK::B(G)+S(F)
        • S(c);SBLOCK::B(G)+S(F),DCHECK
      • Refutation
        • B(h);
    • Try
      • Q(I);N_PINP(f)
      • Threat
        • QAR1(I)
      • Vars
        • R(a);N_GUARD::R1(B),XR(a)
        • P(f);SBLOCK::B(G)+S(F)
        • R(a);N_GUARD::R1(B)
        • B(h);N_GUARD::QAR1(I),XB(h)
        • B(h);N_GUARD::QAR1(I)
      • Refutation
        • R(j);
    • Try
      • Q(I);N_PINP(f)
      • Threat
        • QAR1(I)
      • Vars
        • R(a);N_GUARD::R1(B),XR(a)
        • P(f);SBLOCK::B(G)+S(F)
        • R(a);N_GUARD::R1(B)
        • B(h);N_GUARD::QAR1(I),XB(h)
        • B(h);N_GUARD::QAR1(I)
      • Refutation
        • R(j);
  • Actual
    • Q(I);N_PINP(f)
    • Threat
      • QAR2(I),XR(a)
    • Vars
      • R(a);N_GUARD,XS(A)::R1(B)
      • P(f);SBLOCK::B(G)+S(F)
      • R(a);N_GUARD::R1(B)
      • R(a);N_GUARD::R1(B),XR(a)
      • B(b);N_GUARD::QAB1(I),XB(b)
      • B(h);SBLOCK::B(G)+S(F)
      • B(h);N_GUARD::QAR2(I)
      • S(c);SBLOCK::B(G)+S(F),DCHECK
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