MESON Chess Problem Database

Problem Display
PID: 86871 (6K1/6R1/8/8/4P2p/7k/5QnP/6r1 w - - 0 1)

Dyadchenko, Grigory P

Cherkasskaya Pravda, 1973

6K1/6R1/8/8/4P2p/7k/5QnP/6r1

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxg2#
    • 1...Rb1
      • 2.Qxg2#
    • 1...Rc1
      • 2.Qxg2#
    • 1...Rd1
      • 2.Qxg2#
    • 1...Re1
      • 2.Qxg2#
    • 1...Rf1
      • 2.Qxg2#
    • 1...Rh1
      • 2.Qxg2#
  • Tries
    • 1.Rg3+?
      • 1...hxg3
        • 2.Qxg3#
      • 1...Kxh2!
  • Keys
    • 1.Rg4!
      • 1...Kxh2
        • 2.Rxh4#
      • 1...Kxg4
        • 2.Qf5#
      • 1...Rf1
        • 2.Qxg2#
      • 1...Ra1
        • 2.Qxg2#
      • 1...Rb1
        • 2.Qxg2#
      • 1...Rc1
        • 2.Qxg2#
      • 1...Rd1
        • 2.Qxg2#
      • 1...Re1
        • 2.Qxg2#
      • 1...Rh1
        • 2.Qxg2#
      • 1...Se1
        • 2.Qxh4#
      • 1...Se3
        • 2.Qxh4#
      • 1...Sf4
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(d);OGATE,XR(D)::QAR1(A),XP(d)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(b),XP(B)
  • Actual
    • R(D);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b),XP(B)::R(D),XP(d)
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • R(a);N_GUARD::QAB1(A),XS(b)
      • S(b);N_GUARD,P_PINR(D)::QAR1(A),XP(d)
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