MESON Chess Problem Database

Problem Display
PID: 166296 (3n4/1P1R1P2/2P1P3/3B4/1pp1pP2/1rPkp3/1pRp4/1K1Q4 w - - 0 1)

Dyachuk, Vasyl Vasilovich

3rd Prize, StrateGems, 2016

3n4/1P1R1P2/2P1P3/3B4/1pp1pP2/1rPkp3/1pRp4/1K1Q4

#2

11 + 9

506 American Chess Association 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc6
      • 2.Bxc6#
    • 1...Sxe6
      • 2.Bxe6#
    • 1...e2
      • 2.Qxd2#
  • Tries
    • 1.Rxd2+?
      • 1...Kxc3
        • 2.Rc2#
        • 2.Qc2#
      • 1...exd2!
    • 1.cxb4?
      • threat
        • 2.Bxc4#
      • 1...Kd4
        • 2.Bxc4#
      • 1...e2
        • 2.Qxd2#
      • 1...c3
        • 2.Bxb3#
      • 1...Rc3!
    • 1.c7?
      • threat
        • 2.Bc6#
      • 1...Sxe6
        • 2.Bxe6#
      • 1...Sxb7
        • 2.Bxb7#
      • 1...e2
        • 2.Qxd2#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Sxf7!
    • 1.e7?
      • threat
        • 2.Be6#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Sxf7
        • 2.Bxf7#
      • 1...e2
        • 2.Qxd2#
      • 1...Se6
        • 2.Bxe6#
      • 1...Sxb7!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Bxe4#
      • 1...d1Q+
        • 2.Qxd1#
      • 1...d1R+
        • 2.Qxd1#
      • 1...exf3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(i);OGATE,XP(G)::R(J)+B(F),XS(i)
    • S(i);OGATE,XP(H)::R(J)+B(F),XS(i)
    • P(e);N_GUARD::QAR1(B),XP(b)
  • Tries
    • Try
      • R(C);CHECK,XP(b)
      • Refutation
        • P(e);P_SPINP(e),XR(C)
    • Try
      • P(D);XP(f)
      • Threat
        • R(J)+B(F),DCHECK,XP(g)
      • Vars
        • K(d);P-FLIGHT::R(J)+B(F),XP(g)
        • P(e);N_GUARD::QAR1(B),XP(b)
        • P(g);OGATE::R(J)+B(F),XR(c)
      • Refutation
        • R(c);
    • Try
      • P(G);
      • Threat
        • R(J)+B(F)
      • Vars
        • S(i);OGATE,XP(H)::R(J)+B(F),XS(i)
        • S(i);OGATE,XP(I)::R(J)+B(F),XS(i)
        • P(e);N_GUARD::QAR1(B),XP(b)
        • S(i);::R(J)+B(F),XS(i)
      • Refutation
        • S(i);XP(K)
    • Try
      • P(H);
      • Threat
        • R(J)+B(F)
      • Vars
        • S(i);OGATE,XP(G)::R(J)+B(F),XS(i)
        • S(i);OGATE,XP(K)::R(J)+B(F),XS(i)
        • P(e);N_GUARD::QAR1(B),XP(b)
        • S(i);::R(J)+B(F),XS(i)
      • Refutation
        • S(i);XP(I)
  • Actual
    • Q(B);N_PINP(b),P_PINP(e)
    • Threat
      • R(J)+B(F),DCHECK,XP(h)
    • Vars
      • P(b);CHECK,OGATEB::QAR2(B),XQ(b)
      • P(b);CHECK,OGATEB::QAR2(B),XR(b)
      • P(h);N_SPINP(e),OGATE,XQ(B)::R(J)+B(F),XP(h)
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