MESON Chess Problem Database
Problem Display
PID: 227554 (3nnB2/2p5/R7/1qN1k1Nb/4BppK/5p2/5Q2/8 w - - 0 1)
Neunivako, Pavel Efimovich
8th Prize, 64 Shakhmatnoe obozrenie, 1926
#2
7 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sd7#
- 2.Qb2#
- 1...Qe2
- 2.Sd7#
- 1...Qd3
- 2.Sxd3#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qxa6
- 2.Sd7#
- 2.Qb2#
- 1...Qc6
- 2.Qb2#
- 1...Qd7
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qxb2#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 1...Qxc5
- 2.Qxc5#
- 1...Qb6
- 2.Sd7#
- 1...Qb7
- 2.Sd3#
- 2.Sd7#
- 1...Qb8
- 2.Sd3#
- 2.Sd7#
- 1...Sc6
- 2.Sd7#
- 1...Se6
- 2.Rxe6#
- 1...Sb7
- 2.Re6#
- 1...Sf7
- 2.Re6#
- 1...Sd6
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...c6
- 2.Sd7#
- 1...Qf1
- Tries
- 1.Kxh5?
- 1...Sg7+
- 2.Bxg7#
- 1...Qxa6
- 2.Sd7#
- 2.Qb2#
- 1...Qxc5
- 2.Qxc5#
- 1...Qc6
- 2.Qb2#
- 1...Qb6
- 2.Sd7#
- 1...Sc6
- 2.Sd7#
- 1...Se6
- 2.Rxe6#
- 1...Sd6
- 2.Bg7#
- 1...c6
- 2.Sd7#
- 1...Qf1
- 2.Sd7#
- 2.Qb2#
- 1...Qe2
- 2.Sd7#
- 1...Qd3
- 2.Sxd3#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qd7
- 2.Sxd7#
- 1...Qb1
- 2.Sd7#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qxb2#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 1...Qb7
- 2.Sd3#
- 2.Sd7#
- 1...Qb8
- 2.Sd3#
- 2.Sd7#
- 1...Sb7
- 2.Sf7#
- 2.Re6#
- 1...Sf7
- 2.Sxf7#
- 2.Re6#
- 1...g3
- 2.Sxf3#
- 1...Sf6+!
- 1...Sg7+
- 1.Sf7+?
- 1...Sxf7
- 2.Re6#
- 1...Bxf7!
- 1...Sxf7
- 1.Bg7+?
- 1...Sf6
- 2.Bxf6#
- 1...Sxg7!
- 1...Sf6
- 1.Rc6?
- threat
- 2.Sd7#
- 1...Qxc6
- 2.Qb2#
- 1...Qxc5
- 2.Qxc5#
- 1...Qd3
- 2.Sxd3#
- 1...Sf6!
- threat
- 1.Rd6?
- threat
- 2.Qd4#
- 1...Qxc5
- 2.Qxc5#
- 1...Sxd6
- 2.Bg7#
- 1...Se6
- 2.Rxe6#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 2.Qxb2#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 1...Sc6
- 2.Sd7#
- 2.Re6#
- 1...cxd6!
- threat
- 1.Qe3?
- threat
- 2.Qc3#
- 1...Qxc5
- 2.Qxc5#
- 1...Sc6
- 2.Sd7#
- 1...Se6
- 2.Rxe6#
- 1...Qd3
- 2.Sxd3#
- 1...Qa4
- 2.Sd3#
- 1...Qc4
- 2.Sd7#
- 1...Qd7
- 2.Sxd7#
- 1...Qb2
- 2.Sd3#
- 2.Sd7#
- 1...Qb3
- 2.Sd7#
- 1...Qb4
- 2.Sd3#
- 2.Sd7#
- 1...Qa5
- 2.Sd3#
- 2.Sd7#
- 1...fxe3!
- threat
- 1.Kxh5?
- Keys
- 1.Ra5!
- threat
- 2.Sd7#
- 1...Kf6
- 2.Qd4#
- 1...Qxc5
- 2.Qb2#
- 1...Qd7
- 2.Sxd7#
- 1...Sf6
- 2.Sd3#
- threat
- 1.Ra5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 15
- Sets
- Q(d);N_GUARD::S(D)
- Q(d);N_GUARD::S(D),XQ(d)
- Q(d);N_GUARD::QAB(A)
- Q(d);OGATE,XS(D)::QAR2(A),XQ(d)
- S(h);S_CUTQ(d)::S(D)
- S(h);N_GUARD::R1(F),XS(h)
- S(h);N_GUARD::R1(F)
- S(i);N_GUARD::B(G)
- S(i);N_GUARD::B(G),XS(i)
- P(g);S_CUTQ(d)::S(D)
- Tries
- Try
- K(C);P-FLIGHT,XB(f)
- Vars
- S(i);CHECK,N_GUARD::B(G),XS(i)
- Q(d);OGATE,XS(D)::QAR2(A),XQ(d)
- Q(d);N_GUARD::QAB(A)
- Q(d);N_GUARD::S(D)
- S(h);S_CUTQ(d)::S(D)
- S(h);N_GUARD::R1(F),XS(h)
- S(i);N_GUARD::B(G)
- P(g);S_CUTQ(d)::S(D)
- Q(d);N_GUARD::S(D),XQ(d)
- P(c);N_GUARD::S(E),XP(a)
- Refutation
- S(i);CHECK
- Try
- S(E);CHECK
- Vars
- S(h);XS(E)::R1(F)
- Refutation
- B(f);XS(E)
- Try
- B(G);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::B(G),XS(i)
- Refutation
- S(i);XB(G)
- Try
- R(F);
- Threat
- S(D)
- Vars
- Q(d);N_GUARD,XR(F)::QAB(A)
- Q(d);OGATE,XS(D)::QAR2(A),XQ(d)
- Q(d);N_GUARD::S(D),XQ(d)
- Refutation
- S(i);
- Try
- R(F);
- Threat
- QAB1(A)
- Vars
- Q(d);OGATE,XS(D)::QAR2(A),XQ(d)
- S(i);N_GUARD,SBLOCK,XR(F)::B(G)
- S(h);N_GUARD::R1(F),XS(h)
- Q(d);N_GUARD::S(D)
- Refutation
- P(g);XR(F)
- Try
- Q(A);
- Threat
- QAB(A)
- Vars
- Q(d);OGATE,XS(D)::QAR2(A),XQ(d)
- S(h);S_CUTQ(d)::S(D)
- S(h);N_GUARD::R1(F),XS(h)
- Q(d);N_GUARD::S(D),XQ(d)
- Q(d);N_GUARD::S(D)
- Refutation
- P(b);XQ(A)
- Try
- Actual
- R(F);
- Threat
- S(D)
- Vars
- K(e);S_FLIGHT::QAB(A)
- Q(d);N_GUARD,P_SPINQ(d),XS(D)::QAB(A)
- Q(d);::R(F)+S(D),DCHECK,XQ(d)
- S(i);SBLOCK::S(D)
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).