MESON Chess Problem Database

Problem Display
PID: 249469 (4r3/7r/nBB1pN2/1P4p1/p1kP4/2pNR3/P5QR/4K3 w - - 0 1)

Shavirin, Valery Mikhailovich

Uralski Problemist, 2000

4r3/7r/nBB1pN2/1P4p1/p1kP4/2pNR3/P5QR/4K3

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Se5#
    • 1...c2
      • 2.Qxc2#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sge5#
      • 1...c2
        • 2.Qxc2#
      • 1...e5
        • 2.Qd5#
      • 1...Sc5!
    • 1.Bc5?
      • threat
        • 2.Se5#
      • 1...e5
        • 2.Qd5#
      • 1...Sxc5!
    • 1.Bd5+?
      • 1...exd5
        • 2.Qxd5#
      • 1...Kxb5!
    • 1.Qe4?
      • threat
        • 2.d5#
      • 1...c2
        • 2.Rxc2#
      • 1...Sc5
        • 2.dxc5#
      • 1...Rh4!
    • 1.Qg4?
      • threat
        • 2.d5#
      • 1...c2
        • 2.Rxc2#
      • 1...Sc5
        • 2.dxc5#
      • 1...e5
        • 2.dxe5#
      • 1...Rh4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Se5#
      • 1...cxb2
        • 2.Rc2#
      • 1...Sc5
        • 2.Qb4#
      • 1...e5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(e);SBLOCK::S(E)
    • P(a);OGATEB::QAR2(C),XP(a)
    • P(f);N_GUARD::QAB1(C)
  • Tries
    • Try
      • S(K);
      • Threat
        • S(K)
      • Vars
        • P(a);OGATEB::QAR2(C),XP(a)
        • P(f);N_GUARD::QAB1(C)
      • Refutation
        • S(e);
    • Try
      • B(I);
      • Threat
        • S(E)
      • Vars
        • P(f);N_GUARD::QAB1(C)
      • Refutation
        • S(e);XB(I)
    • Try
      • B(J);CHECK
      • Vars
        • P(f);OGATE,P_PINR(F),XB(J)::QAB1(C),XP(f)
      • Refutation
        • K(c);S_FLIGHT,XP(H)
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(G)
      • Vars
        • P(a);OGATEB::R(D),XP(a)
        • S(e);OGATE::QAR(C)+P(G),XS(e)
      • Refutation
        • R(g);
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(G)
      • Vars
        • P(a);OGATEB::R(D),XP(a)
        • S(e);OGATE::QAR(C)+P(G),XS(e)
        • P(f);OGATE::QAR(C)+P(G),XP(f)
      • Refutation
        • R(g);
  • Actual
    • Q(C);
    • Threat
      • S(E)
    • Vars
      • P(a);OGATEB,XQ(C)::R(D)
      • S(e);N_GUARD::QAR1(C)
      • P(f);N_GUARD::B(J)
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