MESON Chess Problem Database

Problem Display
PID: 185125 (B7/Q1P4K/2r1pP2/2P1k3/3RN1P1/4P3/8/8 w - - 0 1)

Shablinski, Mikhail Ivanovich

2nd HM., Myllyniemi-50 JT, 1980

B7/Q1P4K/2r1pP2/2P1k3/3RN1P1/4P3/8/8

#2

10 + 3

117 Suomen Shakki 1981

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qxc5#
    • 1...Rxc7+
      • 2.Qxc7#
  • Tries
    • 1.Qb6?
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Rxc5
        • 2.Qxc5#
        • 2.Qd6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rxb6!
    • 1.Qa5?
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rb6
        • 2.cxb6#
      • 1...Rd6
        • 2.cxd6#
      • 1...Ra6!
  • Keys
    • 1.Qa1!
      • 1...Rxc7+
        • 2.Rd7#
      • 1...Rxc5
        • 2.Rc4#
      • 1...Ra6
        • 2.Ra4#
      • 1...Rb6
        • 2.Rb4#
      • 1...Rd6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE,XP(E)::QAR2(G),XR(b)
    • R(b);CHECK,OGATE,XP(H)::QAB(G),XR(b)
  • Tries
    • Try
      • Q(G);
      • Vars
        • R(b);CHECK,OGATE,XP(H)::QAB(G),XR(b)
        • R(b);OGATE::QAB1(G),XR(b)
      • Refutation
        • R(b);XQ(G)
    • Try
      • Q(G);
      • Vars
        • R(b);CHECK,OGATE,XP(H)::QAB(G),XR(b)
        • R(b);OGATE,P_SPINR(b),XP(E)::QAR2(G),XR(b)
        • R(b);OGATE::QAR(G)+P(E),XR(b)
      • Refutation
        • R(b);
  • Actual
    • Q(G);
    • Vars
      • R(b);CHECK,XP(H)::QAB(G)+R(B)
      • R(b);XP(E)::QAB(G)+R(B)
      • R(b);::QAB(G)+R(B)
      • R(b);::QAB(G)+R(B),XR(b)
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