MESON Chess Problem Database

Problem Display
PID: 269081 (3B4/1ppK2pq/4N1p1/2N1kp1P/p3P1p1/4p3/2P1P1r1/bb2QR2 w - - 0 1)

Shanshin, Valery Yurevich

3/4 HM., Shakhmatnaya kompozitsiya, 2019

3B4/1ppK2pq/4N1p1/2N1kp1P/p3P1p1/4p3/2P1P1r1/bb2QR2

#2

10 + 13

6490 yacpdb 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Qxc3#
    • 1...Ba2
      • 2.Qxa1#
    • 1...Bxc2
      • 2.Qxa1#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Bxc7#
      • 1...c6
        • 2.Bc7#
      • 1...fxe4!
    • 1.Rf4?
      • threat
        • 2.Sd3#
      • 1...Bxc2
        • 2.Qxa1#
      • 1...fxe4!
    • 1.Qg3+?
      • 1...f4
        • 2.Qxf4#
      • 1...Rxg3!
    • 1.Qb4?
      • threat
        • 2.Sd3#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bxc2!
    • 1.Qh4?
      • threat
        • 2.Bxc7#
      • 1...fxe4
        • 2.Qg5#
      • 1...c6
        • 2.Bc7#
      • 1...g5!
    • 1.Qa5?
      • threat
        • 2.Qxc7#
      • 1...fxe4
        • 2.Sd3#
      • 1...c6
        • 2.Qc7#
      • 1...b6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd5#
      • 1...fxe4
        • 2.Bxc7#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ba2
        • 2.Qxa1#
      • 1...c6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(b);OGATE::QAB(A),XB(a)
    • B(b);OGATE,XP(C)::QAB(A),XB(a)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Threat
        • B(J),XP(k)
      • Vars
        • P(k);::B(J)
      • Refutation
        • P(h);XP(E)
    • Try
      • R(B);
      • Threat
        • S(F)
      • Vars
        • B(b);OGATE,XP(C)::QAB(A),XB(a)
      • Refutation
        • P(h);XP(E)
    • Try
      • Q(A);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAB1(A),XP(h)
      • Refutation
        • R(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • P(h);OGATE,XP(E)::QAR1(A),XP(h)
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • B(b);XP(C)
    • Try
      • Q(A);
      • Threat
        • B(J),XP(k)
      • Vars
        • P(h);OGATEB,XP(E)::QAR2(A)
        • P(k);::B(J)
      • Refutation
        • P(i);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(k)
      • Vars
        • P(h);SBLOCK,XP(E)::QAR(A)+S(F),DCHECK
        • P(k);::QAB(A)
      • Refutation
        • P(j);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • P(h);XP(E)::B(J),XP(k)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • B(b);OGATE::QAB(A),XB(a)
      • P(k);N_GUARD::QAB1(A)
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Developed and maintained by Brian Stephenson.
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