MESON Chess Problem Database

Problem Display
PID: 169023 (1B6/4Kp2/4p3/1R1NN3/1pPk4/bp1Ppp2/1PR2nb1/4Qn2 w - - 0 1)

Ryabtsev, Volodimir Grigorovich

Shanshin, Valery Yurevich

SuperProblem, 2017

1B6/4Kp2/4p3/1R1NN3/1pPk4/bp1Ppp2/1PR2nb1/4Qn2

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxe3#
    • 1...Sh2
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qxe3#
    • 1...Sd1
      • 2.Qh4#
    • 1...Sh1
      • 2.Qh4#
    • 1...exd5
      • 2.Rxd5#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sc6#
        • 2.Ba7#
      • 1...e2
        • 2.Ba7#
      • 1...Se4
        • 2.Sc6#
      • 1...Sxd3!
    • 1.Sf6?
      • threat
        • 2.Ba7#
      • 1...Sxd3
        • 2.Sc6#
      • 1...Se4!
    • 1.Qxf1?
      • threat
        • 2.Sc6#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...e2
        • 2.Qxf2#
      • 1...Bxf1!
    • 1.Qe2?
      • threat
        • 2.Sc6#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...fxe2!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Sc6#
      • 1...Sxd2
        • 2.Qxe3#
      • 1...Sxd3
        • 2.Qh4#
      • 1...exd2
        • 2.Ba7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAB1(A),XP(f)
    • S(b);OGATE::QAR(A)
    • P(j);OGATE,XS(G)::R1(F),XP(j)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::B(J)
        • S(b);::S(H)
      • Refutation
        • S(b);XP(D)
    • Try
      • S(G);
      • Threat
        • B(J)
      • Vars
        • S(b);SBLOCK,XP(D)::S(H)
      • Refutation
        • S(b);
    • Try
      • Q(A);XS(a)
      • Threat
        • S(H)
      • Vars
        • S(b);OGATE,XP(D)::QAR1(A),XS(b)
        • P(f);OGATEB::QAB(A),XS(b)
      • Refutation
        • B(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(H)
      • Vars
        • S(b);OGATE,XP(D)::QAR1(A),XS(b)
      • Refutation
        • P(g);XQ(A)
  • Actual
    • R(C);
    • Threat
      • S(H)
    • Vars
      • S(a);N_GUARD,XR(C)::QAB1(A),XP(f)
      • S(b);OGATE,P_SPINS(b),XP(D)::QAR(A)
      • P(f);XR(C)::B(J)
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