MESON Chess Problem Database

Problem Display
PID: 11693 (7K/8/3Q4/8/7p/1PR5/1r2P1RN/3bk3 w - - 0 1)

Lider, Valentin Viktorovich

1st Prize, Busmen's Chess Review, 1971-1972

7K/8/3Q4/8/7p/1PR5/1r2P1RN/3bk3

#2

7 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1?
      • threat
        • 2.Rxd1#
        • 2.Qxd1#
      • 1...Rb1
        • 2.Qb4#
        • 2.Qxd1#
      • 1...Rd2!
    • 1.Qg3+?
      • 1...Kd2
        • 2.Sf1#
      • 1...hxg3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Rc2#
      • 1...Kd2
        • 2.Sf3#
      • 1...Rxe2
        • 2.Re3#
      • 1...Rxb3
        • 2.Rxb3#
      • 1...Bxe2
        • 2.Rc1#
      • 1...Bxb3
        • 2.Rc1#
      • 1...Bc2
        • 2.Rd3#
      • 1...Rc2
        • 2.Rxc2#
      • 1...Rd2
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);P_PINB(a)
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • P(d);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(E)
    • Vars
      • K(b);S_FLIGHT::S(C)
      • R(c);N_GUARD,XP(A)::QAB(F)+R(E)
      • R(c);OGATE,XP(D)::QAB(F)+R(E),XR(c)
      • B(a);XP(A)::QAB(F)+R(E),DCHECK
      • B(a);XP(D)::QAB(F)+R(E),DCHECK
      • B(a);S_CUTR(c)::QAB(F)+R(E)
      • R(c);::QAB(F)+R(E),XR(c)
      • R(c);SBLOCK::QAB(F),XP(d)
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