MESON Chess Problem Database

Problem Display
PID: 169284 (KB6/PQ4nr/R5pq/3P4/r1p1k1Pb/2PR2p1/4B2N/8 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Murashev, Pavel Aleksandrovich

1st Prize, SuperProblem 189. TT, 2017

KB6/PQ4nr/R5pq/3P4/r1p1k1Pb/2PR2p1/4B2N/8

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Re6#
    • 1...Sh5
      • 2.Re6#
    • 1...Se6
      • 2.Rxe6#
    • 1...Se8
      • 2.Re6#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Bf3#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Qe3
        • 2.Rd4#
      • 1...Qf4!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...cxd3
        • 2.Bf3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Sf5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Bf6!
    • 1.Qe7+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Bxe7!
    • 1.d6+?
      • 1...Ke5
        • 2.d7#
      • 1...Kf4!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Rd4#
      • 1...cxd3
        • 2.Rxa4#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Bf6
        • 2.Sxg3#
      • 1...Sf5
        • 2.Re6#
      • 1...Se6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD::R(G)
    • S(h);N_GUARD::R(G),XS(h)
  • Tries
    • Try
      • Q(I);
      • Threat
        • B(A)
      • Vars
        • P(c);OGATE,P_SPINP(c),XR(D)::QAB1(I),XP(c)
        • Q(g);SBLOCK::QAB(I)+R(D),DCHECK
      • Refutation
        • Q(g);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • P(c);SBLOCK,XR(D)::B(A)
        • Q(g);N_GUARD::QAR1(I),XQ(g)
        • S(h);N_GUARD::QAR2(I)
        • S(h);N_GUARD::QAR2(I),XS(h)
      • Refutation
        • B(e);
    • Try
      • Q(I);CHECK
      • Refutation
        • B(e);XQ(I)
    • Try
      • P(F);CHECK
      • Vars
        • K(d);P-FLIGHT::B(K)+P(F)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • R1(D)
    • Vars
      • P(c);OGATEB,XR(D)::R(G),XR(b)
      • Q(g);N_GUARD::S(B),XQ(g)
      • Q(g);N_GUARD::R1(D),XQ(g)
      • B(e);N_GUARD::S(B),XP(a)
      • S(h);N_GUARD::R(G)
      • S(h);N_GUARD::R(G),XS(h)
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