MESON Chess Problem Database

Problem Display
PID: 198802 (1n6/N7/3n4/k1NK4/1R2Q3/b7/8/8 w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Die Quelle (Munich), 1921

1n6/N7/3n4/k1NK4/1R2Q3/b7/8/8

#2

5 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Rb5#
    • 1...Sxe4
      • 2.Rb5#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sf5
      • 2.Rb5#
    • 1...Sb7
      • 2.Rb5#
    • 1...Sf7
      • 2.Rb5#
    • 1...Sc8
      • 2.Rb5#
    • 1...Se8
      • 2.Rb5#
    • 1...Sa6
      • 2.Sb3#
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sd7
      • 2.Sc6#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qa4#
      • 1...Sxe4
        • 2.Rb5#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sc4
        • 2.Rb5#
      • 1...Bxc5!
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Kxb4
        • 2.Qd2#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Bxb4!
    • 1.Qe1?
      • threat
        • 2.Rb5#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Bxb4!
    • 1.Qc4?
      • threat
        • 2.Sb3#
      • 1...Sxc4
        • 2.Rb5#
      • 1...Sb5
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Bxb4!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qa4#
      • 1...Kxb4
        • 2.Qe1#
      • 1...Bxb4
        • 2.Qd8#
      • 1...Sxe8
        • 2.Rb5#
      • 1...Sb5
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sd7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD::R1(A)
    • S(c);N_GUARD,XQ(B)::R1(A)
    • S(c);N_GUARD::R1(A),XS(c)
    • S(d);N_GUARD::S(E),XS(d)
    • S(d);N_GUARD::S(E)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR1(B)
      • Vars
        • S(c);N_GUARD,XQ(B)::R1(A)
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(c);N_GUARD::R1(A),XS(c)
        • S(c);N_GUARD::R1(A)
      • Refutation
        • B(a);XS(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(A)::QAB(B)
        • S(c);N_GUARD::R1(A),XS(c)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(B);
      • Threat
        • QAB(B)+R(A),DCHECK
      • Vars
        • S(c);::QAB(B)+R(A),DCHECK,XS(c)
      • Refutation
        • B(a);P_SPINB(a),XR(A)
    • Try
      • Q(B);
      • Threat
        • S(C)
      • Vars
        • S(c);N_GUARD,XQ(B)::R1(A)
      • Refutation
        • B(a);XR(A)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(A)::QAB(B)
      • B(a);SBLOCK,XR(A)::QAB(B)
      • S(c);N_GUARD,XQ(B)::R1(A)
      • S(d);N_GUARD::S(E),XS(d)
      • S(d);N_GUARD::S(E)
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