MESON Chess Problem Database

Problem Display
PID: 111162 (5Q2/1N1p4/2p5/r3kN1K/2R1pb1p/1B6/6n1/4r3 w - - 0 1)

Shedey, Sergey Oleksandrovich

Shakhmatnaya Moskva, 1970

5Q2/1N1p4/2p5/r3kN1K/2R1pb1p/1B6/6n1/4r3

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rc5#
    • 1...Ke6
      • 2.Rxe4#
  • Tries
    • 1.Kg6?
      • threat
        • 2.Qd6#
      • 1...Kd5
        • 2.Rc5#
      • 1...Ke6
        • 2.Rxe4#
      • 1...Rd5
        • 2.Qe7#
        • 2.Qf6#
        • 2.Qe8#
      • 1...d6
        • 2.Qxd6#
      • 1...Rd1!
    • 1.Sd4?
      • threat
        • 2.Qd6#
        • 2.Qf5#
      • 1...e3
        • 2.Qf5#
      • 1...Rd5
        • 2.Qe7#
        • 2.Qg7#
        • 2.Qf5#
        • 2.Qh8#
      • 1...Se3
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
        • 2.Qf5#
      • 1...Kd5!
    • 1.Sg7?
      • threat
        • 2.Qd6#
        • 2.Qf5#
      • 1...Rd1
        • 2.Qf5#
      • 1...Rd5
        • 2.Qe7#
        • 2.Qf5#
      • 1...Se3
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
        • 2.Qf5#
      • 1...Kd5!
    • 1.Qe7+?
      • 1...Kd5
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rd4#
        • 2.Rxe4#
        • 2.Rc5#
      • 1...Kxf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Se7#
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rd4#
        • 2.Rc5#
        • 2.Rxc6#
      • 1...Kxf6!
  • Keys
    • 1.Sfd6!
      • threat
        • 2.Qf5#
      • 1...Ke6+
        • 2.Rc5#
      • 1...Kd5
        • 2.Rxe4#
      • 1...Se3
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(g);P-FLIGHT::B(A)+R(B),DCHECK
    • K(g);P-FLIGHT,P_PINS(C)::B(A)+R(B),DCHECK,XP(c)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAB1(F)
      • Vars
        • K(g);P-FLIGHT::B(A)+R(B),DCHECK
        • K(g);P-FLIGHT::B(A)+R(B),DCHECK,XP(c)
        • P(i);::QAB1(F),XP(i)
      • Refutation
        • R(a);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(F)
        • S(b);::QAB1(F)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR1(F)
        • S(b);::QAB1(F)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(g);P-FLIGHT,XS(C)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(g);P_PINS(C),S_FLIGHT,XQ(F)
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • K(g);CHECK,P-FLIGHT::B(A)+R(B)
      • K(g);P-FLIGHT::B(A)+R(B),XP(c)
      • S(b);S_CUTR(a)::R1(B),XP(c)
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