MESON Chess Problem Database

Problem Display
PID: 169086 (7B/4pK2/3pR1Pp/1B1k4/1P1pN3/4pN2/n1PrP1r1/3R3Q w - - 0 1)

Kapustin, Fedor Mikhailovich

Permyakov, Evgeni Nikolaevich

3rd Place, SuperProblem 029. TT, 2012

7B/4pK2/3pR1Pp/1B1k4/1P1pN3/4pN2/n1PrP1r1/3R3Q

#2

12 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Rxd4#
    • 1...Rdxe2
      • 2.Rxd4#
      • 2.c4#
    • 1...Rgxe2
      • 2.Qh5#
    • 1...Rf2
      • 2.Qh5#
    • 1...d3
      • 2.c4#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qh5#
      • 1...Rh2
        • 2.Sxh2#
      • 1...h5
        • 2.Qxh5#
      • 1...Rxg3!
    • 1.Bxd4?
      • threat
        • 2.c4#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Rxc2!
    • 1.Rxd2?
      • threat
        • 2.Rxd4#
        • 2.c4#
      • 1...Sc3
        • 2.Sxc3#
        • 2.Rxd4#
      • 1...d3
        • 2.Rxd3#
        • 2.c4#
      • 1...exd2!
    • 1.Rxd6+?
      • 1...exd6
        • 2.Sf6#
      • 1...Kxe4!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.c4#
      • 1...Rf2+
        • 2.Sxf2#
      • 1...Rxc2
        • 2.Sxc2#
      • 1...Sc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATE,P_SPINP(e),XP(C)::R1(A),XP(e)
    • R(c);N_GUARD,XP(D)::QAR(B)
    • R(c);N_GUARD,P_PINS(E)::QAR(B)
    • P(e);N_GUARD::P(C)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR(B)
      • Vars
        • R(c);::QAB(B)+S(E),XR(c)
        • P(h);::QAR(B),XP(h)
      • Refutation
        • R(c);XS(G)
    • Try
      • B(L);XP(e)
      • Threat
        • P(C)
      • Vars
        • S(a);N_GUARD::S(G),XS(a)
      • Refutation
        • R(b);XP(C)
    • Try
      • R(A);P_PINP(e),XR(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);N_SPINP(e),XR(A)
    • Try
      • R(I);CHECK,XP(g)
      • Vars
        • P(i);SBLOCK,XR(I)::S(G)
      • Refutation
        • K(f);S_FLIGHT,XS(G)
  • Actual
    • S(E);XP(e)
    • Threat
      • P(C)
    • Vars
      • R(c);CHECK::QAB(B)+S(G),XR(c)
      • R(b);XP(C)::R(A)+S(E),XR(b)
      • S(a);N_GUARD::S(G),XS(a)
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