MESON Chess Problem Database

Problem Display
PID: 276070 (8/1n1B2nr/K1N4r/3kpp2/p4P2/B1QNPP2/4q3/8 w - - 0 1)

Muller, Dieter

Mat, 1981

8/1n1B2nr/K1N4r/3kpp2/p4P2/B1QNPP2/4q3/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Qxd3#
    • 1...Rh1
      • 2.Se7#
    • 1...Rh2
      • 2.Se7#
    • 1...Rh3
      • 2.Se7#
    • 1...Rh4
      • 2.Se7#
    • 1...Rh5
      • 2.Se7#
    • 1...Rxc6+
      • 2.Qxc6#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5+
      • 2.Qxc5#
    • 1...Sd6
      • 2.Sb4#
      • 2.Se7#
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
    • 1...exf4
      • 2.Qd4#
    • 1...e4
      • 2.Qd4#
  • Keys
    • 1.fxe5!
      • threat
        • 2.Qd4#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Qxe3
        • 2.Sb4#
      • 1...Qb2
        • 2.Sf4#
      • 1...Rh4
        • 2.Se7#
      • 1...Se6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);CHECK,OGATE,P_PINS(H),XS(C)::QAR2(B),XQ(a)
    • R(f);::S(H)
    • R(f);CHECK,OGATE,XS(H)::QAB1(B),XR(f)
    • S(g);N_GUARD::QAR1(B)
    • S(g);CHECK,N_GUARD::QAR1(B),XS(g)
    • P(d);N_GUARD,XP(F)::QAR1(B)
    • P(d);N_GUARD::QAR1(B)
  • Actual
    • P(F);XP(d)
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);CHECK,OGATE,P_PINS(H),XS(C)::QAR2(B),XQ(a)
      • R(f);CHECK,OGATE,XS(H)::QAB1(B),XR(f)
      • S(g);CHECK,N_GUARD::QAR1(B),XS(g)
      • Q(a);N_PINS(C),P_PINS(H),XP(D)::S(C)
      • Q(a);N_PINS(C),P_PINS(H)::S(C)
      • R(f);::S(H)
      • S(h);::S(H)
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