MESON Chess Problem Database

Problem Display
PID: 9369 (5n2/K7/8/2B5/kP6/N1r5/R1P5/1Q6 w - - 0 1)

Mach, Julius Zdenek

Sachove listy, 1901

5n2/K7/8/2B5/kP6/N1r5/R1P5/1Q6

#2

7 + 3

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Qxc2#
    • 1...Rb3
      • 2.Qxb3#
      • 2.cxb3#
    • 1...Rc4
      • 2.Qb3#
    • 1...Rxc5
      • 2.Qb3#
  • Tries
    • 1.Sb5+?
      • 1...Ra3
        • 2.Sc3#
      • 1...Kxb5!
    • 1.b5?
      • threat
        • 2.Qb4#
      • 1...Ka5
        • 2.Sc4#
        • 2.Qb4#
      • 1...Rxc5
        • 2.Sc4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Rb3!
  • Keys
    • 1.Qd1!
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rxa3
        • 2.c4#
      • 1...Rxc5
        • 2.c3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Re3
        • 2.c3#
      • 1...Rf3
        • 2.c3#
      • 1...Rg3
        • 2.c3#
      • 1...Rh3
        • 2.c3#
      • 1...Rc4
        • 2.c3#
      • 1...Se6
        • 2.Qd7#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sh7
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XP(C)::QAB(A),XR(a)
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD,XB(F)::QAB1(A)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(D)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • P(E);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD,XB(F)::R(B)+S(D)
        • R(a);N_GUARD::R(B)+S(D),XR(a)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
      • R(a);OGATE,P_SPINR(a),XS(D)::QAB(A)+P(C)
      • R(a);OGATE,XB(F)::QAB(A)+P(C)
      • R(a);OGATE::QAB(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(a);OGATE::QAB(A)+P(C)
      • R(a);OGATE,SBLOCK::QAB(A)+P(C)
      • S(c);N_GUARD::QAB(A)
      • S(c);N_GUARD::QAB(A),XS(c)
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