MESON Chess Problem Database
Problem Display
PID: 250175 (6B1/1KBp3r/NP4QR/p3N1P1/Rqnk3r/2p2P2/2P2P2/5b2 w - - 0 1)
Neunivako, Pavel Efimovich
64 Shakhmatnoe obozrenie, 1927
#2
13 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd6
- 2.Qxd6#
- 1...Qb1
- 2.Qd6#
- 1...Qb2
- 2.Qd6#
- 1...Qb3
- 2.Qd6#
- 1...Qxb6+
- 2.Qxb6#
- 1...Rh1
- 2.Qe4#
- 1...Rh2
- 2.Qe4#
- 1...Rh3
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 1...Rh5
- 2.Qe4#
- 1...R4xh6
- 2.Qe4#
- 1...Re7
- 2.Rxh4#
- 1...Rg7
- 2.Rxh4#
- 1...Bg2
- 2.Qd3#
- 1...Bd3
- 2.Qxd3#
- 1...Bh3
- 2.Qd3#
- 1...Sb2
- 2.Qd6#
- 1...Sd2
- 2.Qd6#
- 1...Sa3
- 2.Qd6#
- 1...Sxe5
- 2.Qd6#
- 1...Sxb6
- 2.Qxb6#
- 1...Sd6+
- 2.Qxd6#
- 1...d5
- 2.Sc6#
- 1...d6
- 2.Sc6#
- 1...Qd6
- Tries
- 1.Qf6?
- threat
- 2.Sxc4#
- 2.Sc6#
- 1...Qxb6+
- 2.Bxb6#
- 2.Qxb6#
- 1...Sd6+
- 2.Qxd6#
- 1...R4xh6
- 2.Sc6#
- 2.Qf4#
- 1...R7xh6
- 2.Sc6#
- 1...Sxe5
- 2.Bxe5#
- 2.Qxe5#
- 2.Qd6#
- 1...Sxb6
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Bxb6#
- 2.Qxb6#
- 1...Qc5
- 2.Sc6#
- 1...Qd6
- 2.Sc6#
- 2.Qxd6#
- 1...Qe7
- 2.Sc6#
- 1...Qf8
- 2.Sc6#
- 1...Qb5
- 2.Sc6#
- 1...Re4
- 2.Sc6#
- 1...Rf4
- 2.Sc6#
- 2.Qxf4#
- 1...Re7
- 2.Sc6#
- 2.Rxh4#
- 1...Sb2
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Qd6#
- 1...Sd2
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Qd6#
- 1...Sa3
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Qd6#
- 1...Se3
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 1...d5
- 2.Sc6#
- 1...Rf7!
- threat
- 1.Qf6?
- Keys
- 1.Qg7!
- threat
- 2.Sc6#
- 1...Qxb6+
- 2.Bxb6#
- 1...Sd6+
- 2.Rxd6#
- 1...Rxg7
- 2.Rxh4#
- 1...Sxe5
- 2.Bxe5#
- 2.Rd6#
- 2.Qxe5#
- threat
- 1.Qg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 21
- Sets
- Q(c);N_GUARD,N_PINP(H),P_SPINS(d)::QAR2(I),XQ(c)
- Q(c);N_GUARD,P_SPINS(d)::QAR2(I)
- Q(c);CHECK,OGATE,P_SPINS(d),XP(H)::QAB(I),XQ(c)
- R(f);N_GUARD::QAR1(I)
- R(f);N_GUARD::QAR1(I),XR(f)
- R(f);N_GUARD,XR(J)::QAR1(I)
- R(i);N_GUARD::R(J),XR(f)
- B(a);N_GUARD,N_PINP(H),P_PINP(C)::QAR1(I)
- B(a);N_GUARD::QAR1(I),XB(a)
- B(a);N_GUARD::QAR1(I)
- S(d);N_GUARD,P_SPINQ(c)::QAR2(I)
- S(d);N_GUARD,P_SPINQ(c),XS(E)::QAR2(I)
- S(d);OGATE,P_SPINQ(c),XP(H)::QAB(I),XS(d)
- S(d);CHECK,N_GUARD,P_SPINQ(c)::QAR2(I),XS(d)
- P(h);N_GUARD,P_PINB(L)::S(E)
- Tries
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(d);CHECK,N_GUARD,P_SPINQ(c)::QAR2(I),XS(d)
- R(i);XR(J)::QAB(I)+S(E),DCHECK
- Q(c);N_PINP(H),P_SPINS(d)::QAB(I)+S(E),DCHECK
- Q(c);P_SPINS(d)::QAB(I)+S(E),DCHECK
- R(f);::QAB(I)+S(E),DCHECK
- P(h);P_PINB(L)::QAB(I)+S(E),DCHECK
- Refutation
- R(i);
- Try
- Actual
- Q(I);
- Threat
- QAB(I)+S(E),DCHECK
- Vars
- Q(c);CHECK,OGATE,P_SPINS(d),XP(H)::B(L),XQ(c)
- S(d);CHECK,N_GUARD,P_SPINQ(c)::R(J),XS(d)
- R(i);N_GUARD,XQ(I)::R(J),XR(f)
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).