MESON Chess Problem Database

Problem Display
PID: 134919 (n1b5/4Q1p1/r3P1p1/P1PNk3/4p1P1/1N1ppp1K/B7/4B3 w - - 0 1)

Chepizhni, Viktor Ivanovich

1st Prize, Moscow Championship, 2008

n1b5/4Q1p1/r3P1p1/P1PNk3/4p1P1/1N1ppp1K/B7/4B3

#2

10 + 10

56 The Problemist 2009
145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa5
      • 2.Qd6#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Rxe6
      • 2.Qg5#
    • 1...Ra7
      • 2.Qd6#
    • 1...Sb6
      • 2.Qd6#
  • Tries
    • 1.Sa1?
      • threat
        • 2.Bc3#
      • 1...Kd4
        • 2.Bc3#
      • 1...d2!
    • 1.Sc1?
      • threat
        • 2.Bc3#
      • 1...Kd4
        • 2.Bc3#
      • 1...d2!
    • 1.Sc3?
      • threat
        • 2.Bg3#
      • 1...Kf4
        • 2.Bg3#
      • 1...f2!
    • 1.Sb4?
      • threat
        • 2.Bg3#
      • 1...Kf4
        • 2.Bg3#
      • 1...f2!
    • 1.Sf4?
      • threat
        • 2.Qg5#
      • 1...Kxf4
        • 2.Bg3#
      • 1...g5
        • 2.Qxg5#
      • 1...Bxe6!
    • 1.Sc7?
      • threat
        • 2.Bg3#
        • 2.Qg5#
      • 1...Kf4
        • 2.Bg3#
      • 1...Bxe6
        • 2.Bg3#
      • 1...f2
        • 2.Qg5#
      • 1...g5
        • 2.Bg3#
        • 2.Qxg5#
      • 1...Sxc7!
    • 1.Qd7?
      • threat
        • 2.Bc3#
        • 2.Bg3#
      • 1...Rd6
        • 2.Qxd6#
      • 1...f2
        • 2.Bc3#
      • 1...d2
        • 2.Bg3#
      • 1...Bxd7!
    • 1.Qxg7+?
      • 1...Kxe6
        • 2.Sd4#
        • 2.Sf4#
      • 1...Kxd5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxg7#
      • 1...Kxd4
        • 2.Bc3#
      • 1...Rxe6
        • 2.Sc6#
      • 1...Ra7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,XP(F)::QAB1(J)
    • R(f);N_GUARD::QAB1(J),XR(f)
    • R(f);P_SPINR(f),SBLOCK,XP(I)::QAR2(J)
    • R(f);N_GUARD::QAB1(J)
    • S(i);S_CUTR(f)::QAB1(J)
  • Tries
    • Try
      • S(C);
      • Threat
        • B(A)
      • Vars
        • K(e);S_FLIGHT::B(A)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Threat
        • B(A)
      • Vars
        • K(e);S_FLIGHT::B(A)
      • Refutation
        • P(a);
    • Try
      • S(H);
      • Threat
        • B(A)
      • Vars
        • K(e);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • S(H);
      • Threat
        • B(A)
      • Vars
        • K(e);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • S(H);
      • Threat
        • QAR2(J)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XS(H)::B(A)
        • P(g);::QAR2(J),XP(g)
      • Refutation
        • B(j);P_PINP(E),P_SPINB(j),XP(I)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::B(A)
        • B(j);P_PINP(E),P_SPINB(j),XP(I)::B(A)
        • P(c);::QAR2(J)
      • Refutation
        • S(i);XS(H)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);N_GUARD::QAB1(J),XR(f)
        • P(c);::B(A)
        • P(a);::B(A)
      • Refutation
        • B(j);XQ(J)
    • Try
      • Q(J);CHECK,XP(h)
      • Refutation
        • K(e);P-FLIGHT,XS(H)
  • Actual
    • S(C);
    • Threat
      • QAB(J),XP(h)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(C)::B(A)
      • R(f);N_GUARD,P_SPINR(f),XP(I)::S(C)
      • R(f);N_GUARD::S(C)
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