MESON Chess Problem Database

Problem Display
PID: 156664 (8/5K2/6R1/7k/5P1N/1Q4r1/8/8 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2007

8/5K2/6R1/7k/5P1N/1Q4r1/8/8

#2

5 + 2

5459 Sachmatija 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1+?
      • 1...Kxh4
        • 2.Rh6#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rf3!
    • 1.Qd5+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kxh4!
    • 1.Qe6?
      • threat
        • 2.Rh6#
      • 1...Kxh4
        • 2.Rh6#
      • 1...Rxg6!
    • 1.Qf3+?
      • 1...Kxh4
        • 2.Rh6#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rxf3!
    • 1.Qb5+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kxh4!
  • Keys
    • 1.Sf5!
      • 1...Rxb3
        • 2.Rg5#
      • 1...Rxg6
        • 2.Qh3#
      • 1...Rg5
        • 2.Rxg5#
        • 2.Qh3#
      • 1...Rg1
        • 2.Qh3#
      • 1...Rg2
        • 2.Qh3#
      • 1...Rc3
        • 2.Rg5#
      • 1...Rd3
        • 2.Rg5#
      • 1...Re3
        • 2.Rg5#
      • 1...Rf3
        • 2.Rg5#
        • 2.Qxf3#
      • 1...Rh3
        • 2.Rg5#
        • 2.Qxh3#
      • 1...Rg4
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::R(D)
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • R(a);P_PINP(B),P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XS(C)
    • Try
      • Q(A);
      • Threat
        • R1(D)
      • Vars
        • K(b);P-FLIGHT,XS(C)::R(D)
      • Refutation
        • R(a);XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::R(D)
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • R(a);P_PINP(B),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • R(a);N_GUARD,XQ(A)::R1(D)
      • R(a);OGATE,XR(D)::QAR2(A)
      • R(a);OGATE::QAR2(A)
      • R(a);N_GUARD::R1(D)
      • R(a);SBLOCK::R1(D)
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