MESON Chess Problem Database

Problem Display
PID: 196904 (4n3/4R3/2kp4/KNqp4/5n2/N2B4/8/2R3Q1 w - - 0 1)

Hannemann, Knud Harald

Skakbladet, 1919

4n3/4R3/2kp4/KNqp4/5n2/N2B4/8/2R3Q1

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Sa7#
      • 2.Qb6#
      • 2.Qxc1#
    • 1...Qc2
      • 2.Sa7#
      • 2.Rxc2#
      • 2.Qb6#
    • 1...Qc3+
      • 2.Rxc3#
    • 1...Qc4
      • 2.Sa7#
      • 2.Qb6#
    • 1...Sf6
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
    • 1...Sg7
      • 2.Rc7#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Sd4#
        • 2.Sa7#
      • 1...Sc7+
        • 2.Rxc7#
      • 1...Qxc1
        • 2.Sa7#
        • 2.Qb6#
        • 2.Qxc1#
      • 1...Qc2
        • 2.Sa7#
        • 2.Rxc2#
        • 2.Qb6#
      • 1...Qc3
        • 2.Sa7#
        • 2.Rxc3#
        • 2.Qb6#
      • 1...Qc4
        • 2.Qb6#
      • 1...Se2
        • 2.Sa7#
      • 1...Se6
        • 2.Sa7#
      • 1...d4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sb4#
        • 2.Sd4#
      • 1...Qa3+
        • 2.Scxa3#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qb6+
        • 2.Qxb6#
      • 1...Qa7+
        • 2.Sxa7#
      • 1...Qc3+
        • 2.Sb4#
      • 1...Qxb5+
        • 2.Bxb5#
      • 1...Qxc2
        • 2.Sa7#
        • 2.Rxc2#
        • 2.Qb6#
      • 1...Sxd3
        • 2.Sd4#
      • 1...Qd4
        • 2.Sb4#
        • 2.Scxd4#
      • 1...Sc7
        • 2.Rxc7#
      • 1...d4
        • 2.Sb4#
      • 1...Qc4
        • 2.Sb4#
        • 2.Sa7#
        • 2.Qb6#
      • 1...Se2
        • 2.Sb4#
      • 1...Se6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,N_PINS(F),OGATEB::R(A),XQ(b)
    • S(f);N_GUARD::R1(G)
    • S(f);N_GUARD::R1(G),XS(f)
  • Tries
    • Try
      • K(E);N_SPINS(F),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK,N_GUARD::R1(G),XS(f)
        • Q(b);OGATE,P_PINS(F)::QAR1(B)
        • S(a);::S(F)
      • Refutation
        • P(c);
  • Actual
    • S(C);N_PINQ(b)
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);CHECK,N_PINS(F)::R(A)+S(C),XQ(b)
      • Q(b);CHECK,N_PINS(F)::R(A)+S(C),DCHECK,XQ(b)
      • Q(b);CHECK,N_PINS(F),OGATE::QAR1(B),XQ(b)
      • Q(b);CHECK,N_PINS(F)::S(F),XQ(b)
      • Q(b);CHECK,N_PINS(F)::S(C)
      • Q(b);CHECK,OGATE,XS(F)::B(D),XQ(b)
      • S(a);XB(D)::S(C)
      • S(f);N_GUARD::R1(G),XS(f)
      • P(c);::S(C)
      • S(a);::S(C)
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