MESON Chess Problem Database

Problem Display
PID: 161751 (n3R3/Np2r3/pbPB4/3p2p1/K2kP2R/1Pp5/n4P2/1qN1rQ2 w - - 0 1)

Anders, Wilhelm

Die Schwalbe, 1933

n3R3/Np2r3/pbPB4/3p2p1/K2kP2R/1Pp5/n4P2/1qN1rQ2

#2

11 + 12

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qxe4
      • 2.Qd3#
    • 1...Qa1
      • 2.Qd3#
    • 1...Qb2
      • 2.Qd3#
    • 1...Qxb3+
      • 2.Sxb3#
    • 1...c2
      • 2.Qd3#
    • 1...dxe4
      • 2.Qc4#
    • 1...a5
      • 2.Sb5#
    • 1...bxc6
      • 2.Sxc6#
  • Tries
    • 1.exd5+?
      • 1...Qe4
        • 2.Qd3#
        • 2.Qc4#
      • 1...R1e4
        • 2.Qc4#
      • 1...R7e4
        • 2.Qc4#
      • 1...gxh4
        • 2.Qc4#
      • 1...g4
        • 2.Qc4#
      • 1...Kxd5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd5#
      • 1...Qxb3+
        • 2.Sxb3#
      • 1...axb5+
        • 2.Sxb5#
      • 1...Qxe4
        • 2.Qd3#
      • 1...R1xe4
        • 2.Se2#
      • 1...R7xe4
        • 2.Be5#
      • 1...dxe4
        • 2.Qc4#
      • 1...bxc6
        • 2.Sxc6#
      • 1...c2
        • 2.Qd3#
      • 1...Re5
        • 2.Bxe5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc7
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::QAR1(B),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(F)::QAR1(B)
    • Q(a);N_GUARD::QAR1(B)
    • Q(a);CHECK,XP(D)::S(A),XQ(a)
    • P(d);S_CUTQ(a)::QAR1(B)
    • P(f);N_GUARD,P_SPINP(f),XP(F)::QAR1(B)
    • P(h);N_GUARD::S(J)
    • P(j);XP(H)::S(J),XP(j)
  • Tries
    • Try
      • P(F);CHECK,XP(f)
      • Vars
        • R(b);P_SPINR(b)::QAR1(B)
        • R(k);P_SPINR(k)::QAR1(B)
        • P(g);XR(G)::QAR1(B)
        • P(g);P_SPINP(g)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT,XP(F)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(f)
    • Vars
      • Q(a);CHECK,XP(D)::S(A),XQ(a)
      • P(h);CHECK,XQ(B)::S(J),XP(h)
      • Q(a);N_GUARD,P_SPINQ(a),XP(F)::QAR1(B)
      • R(b);N_GUARD,P_SPINR(b),XP(F)::S(A)
      • R(k);N_GUARD,P_SPINR(k),XP(F)::B(I)
      • P(f);N_GUARD,P_SPINP(f),XP(F)::QAR1(B)
      • P(j);XP(H)::S(J),XP(j)
      • P(d);S_CUTQ(a)::QAR1(B)
      • R(k);N_GUARD::B(I),XR(k)
      • B(i);N_GUARD::QAB1(B),XB(i)
      • S(c);N_GUARD::QAR2(B),XS(c)
      • S(l);N_GUARD::QAB(B),XB(i)
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