MESON Chess Problem Database

Problem Display
PID: 110715 (8/8/3Kp3/3pNp1p/1p1RpR1P/1Pp1k1p1/2Q5/8 w - - 0 1)

Zhukovin, Konstantin

Shakhmaty, 1958

8/8/3Kp3/3pNp1p/1p1RpR1P/1Pp1k1p1/2Q5/8

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd3#
    • 1...Kxf4
      • 2.Qc1#
    • 1...g2
      • 2.Qf2#
  • Tries
    • 1.Kc5?
      • 1...g2
        • 2.Qf2#
      • 1...Kxf4!
    • 1.Kxe6?
      • 1...Kxf4
        • 2.Qc1#
      • 1...g2
        • 2.Qf2#
      • 1...Kxd4!
    • 1.Rxb4?
      • 1...Kxf4
        • 2.Qc1#
      • 1...g2
        • 2.Qf2#
      • 1...d4!
    • 1.Rf3+?
      • 1...Kxd4
        • 2.Sc6#
        • 2.Qd1#
      • 1...exf3!
    • 1.Qd1?
      • 1...Kxf4
        • 2.Qf3#
        • 2.Qc1#
      • 1...c2
        • 2.Qd2#
      • 1...g2!
    • 1.Qd3+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...exd3!
    • 1.Qc1+?
      • 1...Kxd4
        • 2.Qg1#
      • 1...Ke2!
    • 1.Qe2+?
      • 1...Kxd4
        • 2.Sf3#
        • 2.Sc6#
        • 2.Qd3#
      • 1...Kxf4
        • 2.Sd3#
        • 2.Sg6#
        • 2.Qf3#
      • 1...Kxe2!
    • 1.Qxc3+?
      • 1...Ke2
        • 2.Qd2#
      • 1...Kxf4
        • 2.Qd2#
        • 2.Qc1#
        • 2.Qf3#
      • 1...bxc3!
  • Keys
    • 1.Qg2!
      • 1...Kxd4
        • 2.Qg1#
      • 1...Kxf4
        • 2.Qf3#
      • 1...c2
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);P_SPINP(e),S_FLIGHT,XR(C)::QAR1(A)
    • K(b);P_SPINP(e),S_FLIGHT,XR(D)::QAB(A)
    • P(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);P_SPINP(e),S_FLIGHT,XR(D)
    • Try
      • K(G);P-FLIGHT,XP(i)
      • Vars
        • K(b);P_SPINP(e),S_FLIGHT,XR(D)::QAB(A)
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);P_SPINP(e),S_FLIGHT,XR(C)
    • Try
      • R(C);XP(d)
      • Vars
        • K(b);P_SPINP(e),S_FLIGHT,XR(D)::QAB(A)
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • P(f);
    • Try
      • R(D);CHECK
      • Refutation
        • P(e);XR(D)
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(e),S_FLIGHT,XR(D)::QAR1(A)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(e),S_FLIGHT,XR(C)::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(e),S_FLIGHT,XR(C)::QAB(A)
      • K(b);P_SPINP(e),S_FLIGHT,XR(D)::QAR1(A)
      • P(a);N_GUARD::QAB1(A)
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