MESON Chess Problem Database

Problem Display
PID: 37592 (8/pp1N2p1/3pp3/RB1k2BR/4p2K/1P1r3p/2N3p1/b4Q2 w - - 0 1)

Selb, Hans

Die Schwalbe, 1962

8/pp1N2p1/3pp3/RB1k2BR/4p2K/1P1r3p/2N3p1/b4Q2

#2

9 + 11

3150 Asthetik und Ornamentik im Schachproblem 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qc4#
    • 1...Rd2
      • 2.Qc4#
    • 1...Rxb3
      • 2.Qc4#
    • 1...Re3
      • 2.Qc4#
    • 1...Rf3
      • 2.Qc4#
    • 1...Rg3
      • 2.Qc4#
    • 1...Rd4
      • 2.Se3#
    • 1...Bd4
      • 2.Sb4#
    • 1...e3
      • 2.Qf3#
    • 1...e5
      • 2.Qf7#
  • Tries
    • 1.Se3+?
      • 1...Rxe3
        • 2.Qc4#
      • 1...Kd4!
    • 1.Sb6+?
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Bf6#
        • 2.Qf4#
      • 1...axb6!
    • 1.Ba6+?
      • 1...b5
        • 2.Bb7#
      • 1...Kc6!
    • 1.Be3+?
      • 1...Be5
        • 2.Sb4#
      • 1...e5
        • 2.Qf7#
      • 1...g5+!
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Se3#
        • 2.Sb4#
        • 2.Qc4#
        • 2.Qxd4#
      • 1...exd3!
  • Keys
    • 1.Sb8!
      • threat
        • 2.Bc4#
        • 2.Bc6#
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Bf6#
      • 1...e3
        • 2.Bc6#
      • 1...e5
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE::QAB1(A)
    • R(c);OGATE,XP(C)::QAB1(A)
    • R(c);N_GUARD,SBLOCK::S(B)
    • B(a);SBLOCK::S(B)
    • P(e);OGATEB::QAB(A)
    • P(h);OGATEB::QAB(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(c);OGATE,XS(B)::QAB1(A)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • K(f);P-FLIGHT::R(H)+B(G),DCHECK
      • Refutation
        • P(i);XS(I)
    • Try
      • B(F);CHECK
      • Vars
        • P(j);P_SPINP(j)::B(F)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(G);CHECK
      • Vars
        • B(a);P_SPINB(a)::S(B)
        • P(h);P_SPINP(h),S_CUTB(a),S_CUTP(k)::QAB(A)
      • Refutation
        • P(k);CHECK,P_SPINP(k)
    • Try
      • Q(A);CHECK,XR(c)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • S(I);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT::R(H)+B(G),DCHECK
      • P(e);::R(E)+B(F),DCHECK
      • P(h);SBLOCK::R(E)+B(F),DCHECK
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