MESON Chess Problem Database

Problem Display
PID: 145344 (1K4nb/3NP3/1pk1r1R1/5pPb/3pN1n1/Bp4P1/2qP1P2/2R2Q1B w - - 0 1)

Goldschmeding, Cornelis

Die Schwalbe, 1962

1K4nb/3NP3/1pk1r1R1/5pPb/3pN1n1/Bp4P1/2qP1P2/2R2Q1B

#2

13 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sc3#
      • 2.Sef6#
    • 1...Rd6
      • 2.Rxd6#
    • 1...Rf6
      • 2.Sexf6#
    • 1...Rxg6
      • 2.Sef6#
  • Tries
    • 1.Sc3+?
      • 1...Qe4
        • 2.Qb5#
      • 1...Kxd7!
    • 1.Sec5+?
      • 1...Kd6
        • 2.Rxe6#
      • 1...Qe4!
    • 1.Sd6+?
      • 1...Re4
        • 2.Qb5#
      • 1...Kxd7!
    • 1.Rxe6+?
      • 1...Kd5
        • 2.Rd6#
      • 1...Kxd7!
  • Keys
    • 1.e8Q!
      • threat
        • 2.Qxe6#
      • 1...Be5+
        • 2.Sd6#
      • 1...Kd5
        • 2.Sc3#
        • 2.Sef6#
        • 2.Qxe6#
      • 1...Rxg6
        • 2.Sd6#
        • 2.Sef6#
        • 2.Sdf6#
      • 1...Qc4
        • 2.Qxc4#
      • 1...d3
        • 2.Sc3#
      • 1...Rd6
        • 2.Sxd6#
        • 2.Rxd6#
      • 1...Rf6
        • 2.Sd6#
        • 2.Sexf6#
        • 2.Sdxf6#
      • 1...Se7
        • 2.Sdf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(i);OGATE::R1(J),XR(i)
    • R(i);N_GUARD::B(C)+S(H),XR(i)
    • R(i);N_GUARD,N_SPINR(i),XR(J)::B(C)+S(H)
  • Tries
    • Try
      • S(H);CHECK,N_PINQ(a)
      • Vars
        • Q(a);P_SPINQ(a)::QAB1(B)
      • Refutation
        • K(h);N_SPINR(i),S_FLIGHT,XS(K)
    • Try
      • S(H);CHECK,N_PINQ(a)
      • Vars
        • K(h);P-FLIGHT::R1(J),XR(i)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • S(H);CHECK,N_PINR(i)
      • Vars
        • R(i);P_SPINR(i)::QAB1(B)
      • Refutation
        • K(h);N_SPINQ(a),S_FLIGHT,XS(K)
    • Try
      • R(J);CHECK,XR(i)
      • Vars
        • K(h);N_SPINQ(a),S_FLIGHT::R1(J)
      • Refutation
        • K(h);N_SPINQ(a),S_FLIGHT,XS(K)
  • Actual
    • P(L);
    • Threat
      • QAR2(L),XR(i)
    • Vars
      • B(k);CHECK::B(C)+S(H)
      • Q(a);N_GUARD::QAR2(B),XQ(a)
      • P(c);::B(C)+S(H)
      • S(j);::QAB(L)+S(K)
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