MESON Chess Problem Database
Problem Display
PID: 250179 (3rQ3/2r1n3/p6n/Rq2k1N1/4P3/B1Pp2P1/BN6/1K3R2 w - - 0 1)
Kalina, Vasily Emanuilovich
64 Shakhmatnoe obozrenie, 1927
#2
11 + 8
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Sc4#
- 1...Qd5
- 2.Sxd3#
- 1...Rc4
- 2.Qxe7#
- 1...Rc5
- 2.Qxe7#
- 1...Rcc8
- 2.Qxe7#
- 1...Rd4
- 2.Qh8#
- 1...Rd5
- 2.Qh8#
- 1...Rd7
- 2.Qh8#
- 1...Sg4
- 2.Rf5#
- 1...Sf5
- 2.Rxf5#
- 1...Sf7
- 2.Rf5#
- 1...Sg8
- 2.Rf5#
- 1...Qc5
- Tries
- 1.Rxb5+?
- 1...Rc5
- 2.Sc4#
- 2.Qxe7#
- 1...Rd5
- 2.Sxd3#
- 2.Rxd5#
- 2.Qh8#
- 1...axb5!
- 1...Rc5
- 1.Qxb5+?
- 1...Rc5
- 2.Sc4#
- 1...Rd5
- 2.Sxd3#
- 1...Sd5
- 2.Sxd3#
- 1...axb5!
- 1...Rc5
- 1.Qg6?
- threat
- 2.Sf3#
- 2.Qe6#
- 2.Qf6#
- 2.Qg7#
- 1...Rxc3
- 2.Sf3#
- 2.Qf6#
- 2.Qg7#
- 1...Qc5
- 2.Sc4#
- 2.Sf3#
- 2.Qe6#
- 2.Qf6#
- 1...Rc5
- 2.Sf3#
- 2.Qe6#
- 2.Qf6#
- 1...Rc6
- 2.Sf3#
- 1...Rd6
- 2.Sf3#
- 2.Bxd6#
- 2.Qxd6#
- 1...Rf8
- 2.Bd6#
- 2.Qd6#
- 2.Qe6#
- 1...Rg8
- 2.Sf3#
- 2.Bd6#
- 2.Qd6#
- 2.Qe6#
- 2.Qf6#
- 1...Sg4
- 2.Sf3#
- 2.Sf7#
- 2.Qe6#
- 1...Shf5
- 2.Qe6#
- 1...Shg8
- 2.Sf3#
- 2.Sf7#
- 2.Qe6#
- 1...Sd5
- 2.Sf3#
- 2.Qe6#
- 1...Sef5
- 2.Qe6#
- 1...Sc6
- 2.Sf3#
- 2.Qe6#
- 2.Qf6#
- 1...Sc8
- 2.Sf3#
- 2.Qe6#
- 2.Qf6#
- 1...Seg8
- 2.Sf3#
- 2.Qe6#
- 1...Sxg6!
- threat
- 1.Qf7?
- threat
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 2.Qg7#
- 1...Rxc3
- 2.Qf6#
- 2.Qg7#
- 1...Qc5
- 2.Sc4#
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 1...Rc5
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 2.Qxe7#
- 1...Rc6
- 2.Qf4#
- 1...Rd6
- 2.Qf4#
- 1...Rf8
- 2.Qe6#
- 1...Rg8
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 1...Sg4
- 2.Qe6#
- 2.Qf4#
- 1...Shf5
- 2.Qe6#
- 1...Shg8
- 2.Qe6#
- 2.Qf4#
- 1...Sd5
- 2.Qe6#
- 1...Sef5
- 2.Qe6#
- 1...Sc6
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 1...Sg6
- 2.Qe6#
- 2.Qf6#
- 1...Sc8
- 2.Qe6#
- 2.Qf4#
- 2.Qf6#
- 1...Seg8
- 2.Qe6#
- 2.Qf4#
- 1...Sxf7!
- threat
- 1.Rxb5+?
- Keys
- 1.Rf4!
- threat
- 2.Sf3#
- 1...Qc5
- 2.Sc4#
- 1...Rc5
- 2.Qxe7#
- 1...Sf5
- 2.Rxf5#
- 1...Qd5
- 2.Sxd3#
- 1...Rc4
- 2.Qxe7#
- 1...Rd5
- 2.Qh8#
- threat
- 1.Rf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- Q(b);N_PINS(D)::S(D)
- Q(b);N_PINS(D)::S(D),XP(a)
- R(f);N_GUARD::QAR2(K),XS(g)
- R(f);N_GUARD,N_SPINQ(b)::QAR2(K),XS(g)
- R(h);N_GUARD::QAB(K)
- R(h);N_GUARD,N_SPINQ(b)::QAB(K)
- S(e);N_GUARD::R1(B)
- S(e);N_GUARD::R1(B),XS(e)
- Tries
- Try
- R(I);CHECK,N_SPINS(D),XQ(b)
- Refutation
- P(d);XR(I)
- Try
- Q(K);CHECK,N_PINS(g),N_SPINS(D),XQ(b)
- Vars
- R(f);P_SPINR(f)::S(D)
- R(h);P_SPINR(h)::S(D),XP(a)
- S(g);P_SPINS(g)::S(D),XP(a)
- Refutation
- P(d);P_SPINP(d),XQ(K)
- Try
- Q(K);N_PINS(g)
- Threat
- DUALS(4)
- Vars
- R(f);::S(J)
- S(e);::QAR1(K)
- S(g);::QAR1(K)
- Refutation
- S(g);XQ(K)
- Try
- Q(K);N_PINS(g)
- Threat
- DUALS(4)
- Vars
- R(f);::QAB1(K)
- R(h);::QAB1(K)
- R(h);::QAR1(K)
- S(e);::QAR1(K)
- S(g);N_SPINQ(b)::QAR1(K)
- S(g);::QAR1(K)
- Refutation
- S(e);XQ(K)
- Try
- Actual
- R(B);
- Threat
- S(J)
- Vars
- Q(b);N_PINS(D)::S(D)
- R(f);N_GUARD,N_SPINQ(b)::QAR2(K),XS(g)
- S(e);N_GUARD::R1(B),XS(e)
- Q(b);N_PINS(D)::S(D),XP(a)
- R(f);N_GUARD::QAR2(K),XS(g)
- R(h);N_GUARD,N_SPINQ(b)::QAB(K)
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).