MESON Chess Problem Database
Problem Display
PID: 11302 (2r5/8/pP1PQp2/2N3bR/RBNk3q/1p1Pp3/1P2P1r1/nnKb4 w - - 0 1)
Krelenbaum, Szaja
1st Prize, Ajedrez Mexico, 1938
#2
12 + 12
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qe4#
- 1...Qf2
- 2.Qe4#
- 1...Qg3
- 2.Qe4#
- 1...Qh1
- 2.Qe4#
- 1...Qh2
- 2.Qe4#
- 1...Qh3
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Qxh5
- 2.Qe4#
- 1...Bf4
- 2.Rd5#
- 2.Qd5#
- 2.Qe4#
- 1...Bh6
- 2.Rd5#
- 2.Qd5#
- 1...Sc2
- 2.Sxb3#
- 1...Sc3
- 2.bxc3#
- 1...f5
- 2.Qe5#
- 1...Qe1
- Tries
- 1.Sa5?
- threat
- 2.Ba3#
- 1...Rxc5+
- 2.Bc3#
- 1...Qe1
- 2.Qe4#
- 1...Sc2
- 2.Saxb3#
- 2.Scxb3#
- 1...Sa3
- 2.Bxa3#
- 1...Sc3
- 2.bxc3#
- 1...Sd2!
- threat
- 1.Se5?
- threat
- 2.Sf3#
- 2.Ba3#
- 1...Rxc5+
- 2.Bc3#
- 1...Qxh5
- 2.Ba3#
- 1...Bxe2
- 2.Ba3#
- 1...fxe5
- 2.Ba3#
- 2.Qc4#
- 1...Qe1
- 2.Sf3#
- 1...Qf2
- 2.Ba3#
- 1...Qg3
- 2.Ba3#
- 1...Qh3
- 2.Ba3#
- 1...Qe4
- 2.Ba3#
- 1...Qf4
- 2.Ba3#
- 1...Qg4
- 2.Ba3#
- 1...Rf2
- 2.Ba3#
- 1...Rg3
- 2.Ba3#
- 1...Sc2
- 2.Sxb3#
- 2.Sf3#
- 1...Sa3
- 2.Sf3#
- 2.Bxa3#
- 1...Sc3
- 2.Sf3#
- 2.bxc3#
- 1...Sd2!
- threat
- 1.Rxh4+?
- 1...Bf4
- 2.Rxf4#
- 2.Qe4#
- 1...Bxh4
- 2.Qe4#
- 1...Rg4!
- 1...Bf4
- 1.Rxg5?
- threat
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 2.Qxf6#
- 1...Qxg5
- 2.Qe4#
- 1...Rxe2
- 2.Rd5#
- 2.Qd5#
- 2.Qxf6#
- 1...Rxc5
- 2.Bxc5#
- 2.Qxe3#
- 1...fxg5
- 2.Qe5#
- 1...Qf2
- 2.Rd5#
- 2.Qd5#
- 2.Qe4#
- 1...Qg3
- 2.Rd5#
- 2.Qd5#
- 2.Qe4#
- 1...Qh2
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 2.Qe4#
- 1...Qh3
- 2.Rd5#
- 2.Qd5#
- 2.Qe4#
- 2.Qxf6#
- 1...Qe4
- 2.Qxe4#
- 1...Qf4
- 2.Rd5#
- 2.Qd5#
- 1...Qh5
- 2.Qd5#
- 2.Qxe3#
- 2.Qe4#
- 2.Qxf6#
- 1...Qh6
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 2.Qe4#
- 1...Qh8
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 2.Qe4#
- 1...Rf2
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 1...Rg3
- 2.Rd5#
- 2.Qd5#
- 2.Qxf6#
- 1...Re8
- 2.Rd5#
- 2.Qd5#
- 1...Rf8
- 2.Rd5#
- 2.Qd5#
- 2.Qxe3#
- 1...Sc2
- 2.Sxb3#
- 2.Rd5#
- 2.Qd5#
- 2.Qxf6#
- 1...Sc3
- 2.Bxc3#
- 2.Qxe3#
- 2.Qxf6#
- 2.bxc3#
- 1...f5
- 2.Qe5#
- 1...Rxg5!
- threat
- 1.Qf5?
- threat
- 2.Se6#
- 1...Rxc5
- 2.Bxc5#
- 2.Qxc5#
- 1...Qe4
- 2.Qxe4#
- 1...Re8!
- threat
- 1.Qxf6+?
- 1...Bxf6
- 2.Se6#
- 1...Kd5!
- 1...Bxf6
- 1.Sa5?
- Keys
- 1.Sxe3!
- threat
- 2.Ba3#
- 1...Rxc5+
- 2.Bc3#
- 1...Bxe3+
- 2.Bd2#
- 1...Qe4
- 2.Qxe4#
- 1...Qe1
- 2.Qe4#
- 1...Sc2
- 2.Sxb3#
- 1...Sd2
- 2.Sf5#
- 1...Sa3
- 2.Bxa3#
- 1...Sc3
- 2.bxc3#
- threat
- 1.Sxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- Q(h);N_GUARD::QAR1(L)
- Q(h);N_GUARD::QAR1(L),XQ(h)
- Q(h);N_GUARD,XR(I)::QAR1(L)
- S(a);N_GUARD,S_CUTB(c)::S(H),XP(e)
- S(b);OGATE::P(B),XS(b)
- P(k);N_GUARD::QAB1(L)
- Tries
- Try
- S(G);P_SPINS(H)
- Threat
- R(E)+B(F)
- Vars
- R(l);CHECK,SBLOCK,XS(H)::R(E)+B(F),DCHECK
- Q(h);N_GUARD::QAR1(L)
- S(b);::R(E)+B(F),XS(b)
- S(b);N_PINS(H),OGATE::P(B),XS(b)
- Refutation
- S(b);
- Try
- S(G);P_SPINS(H)
- Threat
- DUALS(2)
- Vars
- R(l);CHECK,SBLOCK,XS(H)::R(E)+B(F),DCHECK
- Q(h);XR(I)::R(E)+B(F)
- B(c);XP(C)::R(E)+B(F)
- Q(h);::S(G)
- Q(h);::R(E)+B(F)
- R(d);::R(E)+B(F)
- Refutation
- S(b);
- Try
- R(I);CHECK,XQ(h)
- Vars
- B(i);XR(I)::QAR1(L)
- Refutation
- R(d);P_SPINR(d)
- Try
- R(I);XB(i)
- Threat
- DUALS(4)
- Vars
- Q(h);N_GUARD,XR(I)::QAR1(L)
- P(k);N_GUARD,XR(I)::QAB1(L)
- Q(h);N_GUARD::QAR1(L),XQ(h)
- P(k);N_GUARD::QAB1(L)
- Refutation
- R(d);XR(I)
- Try
- Q(L);
- Threat
- S(H)
- Vars
- Q(h);N_GUARD::QAR1(L),XQ(h)
- Refutation
- R(l);
- Try
- Q(L);CHECK,XP(k)
- Vars
- B(i);XQ(L)::S(H)
- Refutation
- K(g);P-FLIGHT,P_SPINB(i)
- Try
- Actual
- S(G);P_SPINS(G),XP(f)
- Threat
- R(E)+B(F)
- Vars
- R(l);CHECK,SBLOCK,XS(H)::R(E)+B(F),DCHECK
- B(i);CHECK,P_PINS(H),XS(G)::R(E)+B(F)
- Q(h);N_GUARD::QAR1(L),XQ(h)
- Q(h);N_GUARD::QAR1(L)
- S(a);::S(H),XP(e)
- S(b);N_PINS(G),P_PINS(H)::S(G)
- S(b);::R(E)+B(F),XS(b)
- S(b);OGATE::P(B),XS(b)
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).