MESON Chess Problem Database
Problem Display
PID: 234343 (1KN5/2B1pq2/4Np2/R2B1kpP/3pp1nR/1P2p3/7Q/3r2r1 w - - 0 1)
Chernyavsky, Mykola Vasilovich
Murashev, Pavel Aleksandrovich
Phenix, 2020
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxh5
- 2.Sxe7#
- 1...Qg6
- 2.Sxe7#
- 1...Qe8
- 2.Sg7#
- 1...Qg7
- 2.Sxg7#
- 1...Ra1
- 2.Sxd4#
- 1...Rb1
- 2.Sxd4#
- 1...Rc1
- 2.Sxd4#
- 1...Rde1
- 2.Sxd4#
- 1...Rdf1
- 2.Sxd4#
- 1...Sf2
- 2.Bc4#
- 1...Sxh2
- 2.Bc4#
- 1...Sh6
- 2.Bc4#
- 1...d3
- 2.Sd4#
- 1...gxh4
- 2.Qf4#
- 1...Qxh5
- Tries
- 1.Sf4?
- threat
- 2.Be6#
- 1...Qxd5
- 2.Sxe7#
- 1...gxf4
- 2.Qxf4#
- 1...Qe6
- 2.Bxe6#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Bxe6#
- 1...Se5!
- threat
- 1.Sc5?
- threat
- 2.Bxe4#
- 1...Qxd5
- 2.Sxe7#
- 1...gxh4
- 2.Qf4#
- 1...Qe6
- 2.Bxe6#
- 1...Sf2!
- threat
- 1.Sf8?
- threat
- 2.Be6#
- 1...Qxd5
- 2.Sxe7#
- 1...Qe6
- 2.Bxe6#
- 1...Se5
- 2.Bxe4#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Sd6#
- 2.Bxe6#
- 1...Qxf8!
- threat
- 1.Bxe4+?
- 1...Kxe6
- 2.Bf5#
- 1...Kxe4!
- 1...Kxe6
- 1.Qc2?
- threat
- 2.Qxe4#
- 1...Qxe6
- 2.Bxe4#
- 1...Sf2
- 2.Bc4#
- 1...d3
- 2.Sd4#
- 1...Rd3!
- threat
- 1.Qf2+?
- 1...Sxf2
- 2.Bc4#
- 1...exf2!
- 1...Sxf2
- 1.Qg2?
- threat
- 2.Qxe4#
- 1...Qxe6
- 2.Bxe4#
- 1...Sf2
- 2.Bc4#
- 1...Rxg2!
- threat
- 1.Qh3?
- threat
- 2.Bc4#
- 1...Qxh5
- 2.Sxe7#
- 1...Qe8
- 2.Sg7#
- 1...Ra1
- 2.Sxd4#
- 1...Qxe6!
- threat
- 1.Sf4?
- Keys
- 1.Sd8!
- threat
- 2.Be6#
- 1...Qxd5
- 2.Sxe7#
- 1...Qxh5
- 2.Sxe7#
- 1...Qe6
- 2.Bxe6#
- 1...Se5
- 2.Bxe4#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Sd6#
- 2.Bxe6#
- threat
- 1.Sd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 13
- Sets
- Q(k);N_GUARD,XP(F)::S(J),XP(j)
- Q(k);N_GUARD::S(J),XP(j)
- Q(k);N_GUARD,P_PINS(J)::S(G)
- Q(k);N_GUARD::S(G),XQ(k)
- R(a);N_GUARD::S(G),XP(d)
- R(a);N_GUARD,P_PINP(B)::S(G),XP(d)
- S(f);N_GUARD::R(D)+B(E)
- S(f);N_GUARD,XQ(A)::R(D)+B(E)
- P(d);S_CUTR(a)::S(G)
- P(h);N_GUARD,XR(C)::QAR1(A)
- Tries
- Try
- S(G);
- Threat
- R(D)+B(E),DCHECK
- Vars
- Q(k);N_GUARD,P_SPINQ(k),XB(E)::S(J),XP(j)
- P(h);OGATE,XS(G)::QAR1(A),XP(h)
- Q(k);::R(D)+B(E),DCHECK,XQ(k)
- P(j);N_GUARD,SBLOCK::S(J)
- P(j);::R(D)+B(E),DCHECK,XP(j)
- Refutation
- S(f);
- Try
- S(G);
- Threat
- B(E),XP(e)
- Vars
- Q(k);N_GUARD,XB(E)::S(J),XP(j)
- P(h);N_GUARD,XR(C)::QAR1(A)
- Q(k);N_GUARD::B(E),XQ(k)
- Refutation
- S(f);
- Try
- S(G);
- Threat
- R(D)+B(E),DCHECK
- Vars
- Q(k);N_GUARD,P_SPINQ(k),XB(E)::S(J),XP(j)
- Q(k);::R(D)+B(E),DCHECK,XQ(k)
- S(f);::B(E),XP(e)
- P(j);N_GUARD::S(J)
- Refutation
- Q(k);P_PINS(J),XS(G)
- Try
- B(E);CHECK,XP(e)
- Vars
- K(g);S_FLIGHT,XS(G)::B(E)
- Refutation
- K(g);P_SPINS(f),S_FLIGHT,XB(E)
- Try
- Q(A);P_PINP(e)
- Threat
- QAB1(A),XP(e)
- Vars
- Q(k);SBLOCK,XS(G)::R(D)+B(E),DCHECK,XP(e)
- S(f);N_GUARD::R(D)+B(E)
- P(d);N_SPINP(e),S_CUTR(a)::S(G)
- Refutation
- R(a);N_SPINP(e)
- Try
- Q(A);CHECK
- Vars
- S(f);XQ(A)::R(D)+B(E)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);
- Threat
- QAB1(A),XP(e)
- Vars
- Q(k);SBLOCK,XS(G)::R(D)+B(E),DCHECK,XP(e)
- S(f);N_GUARD::R(D)+B(E)
- Refutation
- R(b);XQ(A)
- Try
- Q(A);P_PINS(f)
- Threat
- R(D)+B(E)
- Vars
- Q(k);N_GUARD,XP(F)::S(J),XP(j)
- Q(k);N_GUARD,P_PINS(J)::S(G)
- R(a);N_GUARD::S(G),XP(d)
- Refutation
- Q(k);XS(G)
- Try
- Actual
- S(G);
- Threat
- R(D)+B(E),DCHECK
- Vars
- Q(k);N_GUARD,P_SPINQ(k),XB(E)::S(J),XP(j)
- Q(k);N_GUARD,XP(F)::S(J),XP(j)
- Q(k);::R(D)+B(E),DCHECK,XQ(k)
- S(f);::B(E),XP(e)
- P(j);N_GUARD::S(J)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).