MESON Chess Problem Database

Problem Display
PID: 86163 (1R1n4/8/n7/r2p4/4Pk2/3r1NNK/3P4/2Q2R2 w - - 0 1)

Vladimirov, Viacheslav Semenovich

Themes-64, 1976

1R1n4/8/n7/r2p4/4Pk2/3r1NNK/3P4/2Q2R2

#2

8 + 6

6490 yacpdb 2009
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Qxd2#
    • 1...Rda3
      • 2.d3#
    • 1...Rb3
      • 2.d3#
    • 1...Rc3
      • 2.dxc3#
    • 1...Re3
      • 2.dxe3#
    • 1...Rxf3
      • 2.d4#
    • 1...Rd4
      • 2.d3#
    • 1...Sb4
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sxb8
      • 2.Qc7#
    • 1...Sc6
      • 2.Rf8#
    • 1...Sb7
      • 2.Rf8#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Se2#
        • 2.Sh5#
      • 1...Rxd2
        • 2.Qxd2#
      • 1...Rxf3
        • 2.d4#
      • 1...Sxb4
        • 2.Qc7#
      • 1...dxe4
        • 2.Rxe4#
      • 1...Re3
        • 2.Sh5#
        • 2.dxe3#
      • 1...Rd4
        • 2.d3#
      • 1...d4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qh6#
      • 1...Rxd2
        • 2.Qh6#
      • 1...Rxf3
        • 2.Qf6#
      • 1...Sxc6
        • 2.Rf8#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Se6
        • 2.Qd6#
      • 1...Sb7
        • 2.Rf8#
        • 2.Qf6#
        • 2.Qh6#
      • 1...Sf7
        • 2.Qf6#
      • 1...d4
        • 2.Se2#

This anticipates 47866(2003)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
    • R(a);OGATE::QAB(A)+P(C)
    • R(a);OGATE::QAB(A)+P(C),XR(a)
    • R(a);OGATE::P(C),XR(a)
    • R(a);OGATE,P_PINS(E),P_SPINR(a),XS(D)::QAB(A)+P(C)
    • S(e);N_GUARD::QAB(A)
    • S(e);N_GUARD::QAB(A),XS(e)
    • S(e);N_GUARD,XR(H)::QAB(A)
    • S(f);OGATE::R(H)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
        • R(a);OGATE,P_PINS(E),P_SPINR(a),XS(D)::QAB(A)+P(C)
        • S(e);N_GUARD,XR(H)::QAB(A)
        • P(d);OGATE,P_SPINP(d),XP(G)::R1(H),XP(d)
        • R(a);OGATE::QAB(A)+P(C)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • R(a);XP(C)::QAB(A)
      • R(a);P_PINS(E),P_SPINR(a),XS(D)::QAR2(A)
      • S(f);OGATE,XQ(A)::R(H)
      • P(d);OGATE,XP(G)::QAR1(A),XP(d)
      • S(f);::QAB(A)
      • S(f);::QAR2(A)
      • P(d);::S(E)
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