MESON Chess Problem Database

Problem Display
PID: 47657 (8/3K4/p7/1R6/kB6/3Q4/8/1r6 w - - 0 1)

Markovtsy, Vassyl Yuriovich

4th HM., Wola Gulowska, 1998

8/3K4/p7/1R6/kB6/3Q4/8/1r6

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002
145 StrateGems 2008
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...axb5
      • 2.Qa3#
  • Tries
    • 1.Rb7?
      • threat
        • 2.Qa3#
      • 1...Ra1
        • 2.Qc2#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Rb3
        • 2.Qxa6#
      • 1...Rxb4!
    • 1.Rb8?
      • threat
        • 2.Qa3#
      • 1...Ra1
        • 2.Qc2#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Rb3
        • 2.Qxa6#
      • 1...Rxb4!
    • 1.Qc4?
      • threat
        • 2.Ra5#
      • 1...Rd1+
        • 2.Bd6#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...a5
        • 2.Rxa5#
      • 1...axb5!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Qa3#
      • 1...Rxb4
        • 2.Rxa6#
      • 1...Ra1
        • 2.Qc2#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Rb3
        • 2.Qxa6#

Anticipated by 9860(1960)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XR(C)::QAR1(A)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::QAB(A)
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
        • R(a);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • R(a);XB(B)
    • Try
      • R(C);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::QAB(A)
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
        • R(a);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • R(a);XB(B)
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • R(a);CHECK,N_GUARD::QAR(A)+B(B)
        • R(a);OGATE,P_SPINR(a),XB(B)::QAR1(A),XR(a)
        • P(c);::R1(C),XP(c)
      • Refutation
        • P(c);XR(C)
  • Actual
    • R(C);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);SBLOCK,XB(B)::R(C),XP(c)
      • R(a);N_GUARD::QAB(A)
      • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
      • R(a);SBLOCK::QAR2(A),XP(c)
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