MESON Chess Problem Database
Problem Display
PID: 133458 (4r1Bn/2pb4/5Q2/2p5/4kBP1/RN6/2P3r1/1K3Rb1 w - - 0 1)
Retter, Yosef
2nd Comm., Jurmala, 2008
#2
9 + 8
| 721 | Variantim | 2008 |
SOLUTION
- SOUND
- Sets
- 1...Rd2
- 2.Sxd2#
- 1...Rf2
- 2.Sxc5#
- 1...Rg3
- 2.Sd2#
- 1...Rxg4
- 2.Sd2#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Qf5#
- 1...Ra8
- 2.Qe5#
- 1...Rb8
- 2.Qe5#
- 1...Rc8
- 2.Qe5#
- 1...Rd8
- 2.Qe5#
- 1...Rf8
- 2.Qe5#
- 1...Rxg8
- 2.Qe5#
- 1...Bf2
- 2.Sd2#
- 1...Bh2
- 2.Sxc5#
- 1...Ba4
- 2.Qf5#
- 1...Bb5
- 2.Qf5#
- 1...Bf5
- 2.Qxf5#
- 2.Qc6#
- 1...Bc6
- 2.Qf5#
- 2.Qxc6#
- 1...Be6
- 2.Qe5#
- 1...Bc8
- 2.Qc6#
- 1...Rd2
- Tries
- 1.Bh2?
- threat
- 2.Qf3#
- 2.Qf4#
- 1...Ke3
- 2.Qf3#
- 1...Rxc2
- 2.Qf3#
- 1...Rxh2
- 2.Qf4#
- 1...Rxg4
- 2.Sd2#
- 2.Qf3#
- 1...Rxg8
- 2.Qe5#
- 2.Qf3#
- 1...Bxh2
- 2.Sxc5#
- 1...Bxg4
- 2.Qf4#
- 1...Re6
- 2.Qf3#
- 1...Be6
- 2.Qe5#
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Rf2
- 2.Sxc5#
- 1...Rg3
- 2.Sd2#
- 2.Qf4#
- 1...Rf8
- 2.Qe5#
- 1...Bf2
- 2.Sd2#
- 2.Qf4#
- 1...Be3
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Bf5!
- threat
- 1.Bg3?
- threat
- 2.Qf3#
- 2.Qf4#
- 1...Ke3
- 2.Qf3#
- 1...Rxc2
- 2.Qf3#
- 1...Rxg3
- 2.Sd2#
- 2.Qf4#
- 1...Rxg8
- 2.Qe5#
- 2.Qf3#
- 1...Bxg4
- 2.Qf4#
- 1...Re6
- 2.Qf3#
- 1...Be6
- 2.Qe5#
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Rf2
- 2.Sxc5#
- 1...Rf8
- 2.Qe5#
- 1...Bf2
- 2.Sd2#
- 2.Qf4#
- 1...Be3
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Bf5!
- threat
- 1.Bd6?
- threat
- 2.Qf3#
- 2.Qf4#
- 1...Ke3
- 2.Qf3#
- 1...Rxc2
- 2.Qf3#
- 1...Rxg4
- 2.Sd2#
- 2.Qf3#
- 1...Rxg8
- 2.Qe5#
- 2.Qf3#
- 1...Bxg4
- 2.Qf4#
- 1...cxd6
- 2.Qf4#
- 1...Re6
- 2.Qf3#
- 1...Be6
- 2.Qe5#
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Rf2
- 2.Sxc5#
- 1...Rg3
- 2.Sd2#
- 2.Qf4#
- 1...Rf8
- 2.Qe5#
- 1...Bf2
- 2.Sd2#
- 2.Qf4#
- 1...Bh2
- 2.Sxc5#
- 2.Qf3#
- 1...Be3
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Bf5!
- threat
- 1.Bxc7?
- threat
- 2.Qf3#
- 2.Qf4#
- 1...Ke3
- 2.Qf3#
- 1...Rxc2
- 2.Qf3#
- 1...Rxg4
- 2.Sd2#
- 2.Qf3#
- 1...Rxg8
- 2.Qe5#
- 2.Qf3#
- 1...Bxg4
- 2.Qf4#
- 1...Re6
- 2.Qf3#
- 1...Be6
- 2.Qe5#
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Rf2
- 2.Sxc5#
- 1...Rg3
- 2.Sd2#
- 2.Qf4#
- 1...Rf8
- 2.Qe5#
- 1...Bf2
- 2.Sd2#
- 2.Qf4#
- 1...Bh2
- 2.Sxc5#
- 2.Qf3#
- 1...Be3
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Bf5!
- threat
- 1.Re1+?
- 1...Re2
- 2.Sd2#
- 1...Be3
- 2.Rxe3#
- 1...Kf3!
- 1...Re2
- 1.Rf2?
- threat
- 2.Sd2#
- 2.Sxc5#
- 1...Rxf2
- 2.Sxc5#
- 1...Rxg8
- 2.Qe5#
- 1...Bxf2
- 2.Sd2#
- 1...Re6
- 2.Qf5#
- 1...Be6
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rb8
- 2.Qe5#
- 1...c4
- 2.Sd2#
- 2.Sc5#
- 2.Qd4#
- 1...Sf7!
- threat
- 1.Ra4+?
- 1...Bd4
- 2.Sxc5#
- 1...Bxa4
- 2.Qf5#
- 1...c4!
- 1...Bd4
- 1.Qc3?
- threat
- 2.Qd3#
- 2.Qf3#
- 1...Rxc2
- 2.Qxc2#
- 2.Qf3#
- 1...Rxg4
- 2.Qd3#
- 1...Bxg4
- 2.Qd3#
- 1...Rf2
- 2.Qe3#
- 1...Rd2
- 2.Sxd2#
- 2.Qf3#
- 1...Rg3
- 2.Sd2#
- 1...Be3
- 2.Qd3#
- 2.Qxe3#
- 1...Bb5
- 2.Qf3#
- 1...c4
- 2.Qf3#
- 1...Bf2!
- threat
- 1.Qd4+?
- 1...cxd4
- 2.Sc5#
- 1...Bxd4!
- 1...cxd4
- 1.Qd6?
- threat
- 2.Bd5#
- 2.Qd3#
- 2.Qd5#
- 1...Rxc2
- 2.Qd5#
- 1...Rxg4
- 2.Qd3#
- 2.Qd5#
- 1...Rxg8
- 2.Qe5#
- 2.Qd3#
- 1...Bxg4
- 2.Qd3#
- 2.Qd5#
- 1...Rf2
- 2.Sxc5#
- 2.Bd5#
- 1...Bf2
- 2.Sd2#
- 2.Bd5#
- 1...Rd2
- 2.Sxd2#
- 1...Rg3
- 2.Sd2#
- 2.Bd5#
- 2.Qd5#
- 1...Re5
- 2.Qxe5#
- 2.Qd3#
- 1...Re6
- 2.Qd3#
- 1...Bd4
- 2.Bd5#
- 2.Qd5#
- 1...Bb5
- 2.Bd5#
- 2.Qd5#
- 1...Bc6
- 2.Qd3#
- 2.Qxc6#
- 1...Be6
- 2.Qe5#
- 2.Qd3#
- 1...Sf7
- 2.Qd3#
- 1...c4
- 2.Bd5#
- 2.Qd5#
- 1...c6
- 2.Qd3#
- 1...cxd6!
- threat
- 1.Qg6+?
- 1...Bf5
- 2.Qxf5#
- 2.Qc6#
- 1...Sxg6!
- 1...Bf5
- 1.Bh2?
- Keys
- 1.Be6!
- threat
- 2.Qe5#
- 2.Qf5#
- 1...Rxc2
- 2.Qf5#
- 1...Rxe6
- 2.Qf5#
- 1...Bxe6
- 2.Qe5#
- 1...Rf2
- 2.Sxc5#
- 1...Bf2
- 2.Sd2#
- 1...Rf8
- 2.Qe5#
- 1...Bd4
- 2.Qf5#
- 1...Sg6
- 2.Qf5#
- 2.Qxg6#
- 1...Sf7
- 2.Qf5#
- 2.Qg6#
- threat
- 1.Be6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- R(b);N_GUARD::S(E),XR(b)
- R(b);S_CUTB(a)::S(E),XP(d)
- R(b);N_GUARD::S(E)
- R(b);N_GUARD,XP(G)::S(E)
- R(g);N_GUARD::QAR1(H),XR(g)
- R(g);S_CUTB(f)::QAB1(H)
- R(g);N_GUARD::QAR1(H)
- R(g);N_GUARD,P_PINS(E)::QAR1(H)
- R(g);N_GUARD,XB(I)::QAR1(H)
- B(a);S_CUTR(b)::S(E)
- B(a);N_GUARD::S(E),XP(d)
- B(f);N_GUARD::QAB1(H)
- B(f);S_CUTR(g)::QAR1(H)
- B(f);N_GUARD::QAB(H)
- Tries
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::QAR1(H)
- R(b);XP(C)::QAB1(H)
- R(b);XB(F)::QAR1(H)
- B(a);N_GUARD,XB(F)::S(E),XP(d)
- B(f);XP(G)::QAR1(H)
- R(g);::QAB1(H)
- S(h);::QAB1(H)
- R(b);S_CUTB(a)::S(E),XP(d)
- R(g);N_GUARD::QAR1(H)
- B(a);::QAB1(H)
- Refutation
- B(f);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::QAR1(H)
- R(b);XP(C)::QAB1(H)
- B(f);XP(G)::QAR1(H)
- R(g);::QAB1(H)
- S(h);::QAB1(H)
- R(b);S_CUTB(a)::S(E),XP(d)
- R(g);N_GUARD::QAR1(H)
- B(a);::QAB1(H)
- Refutation
- B(f);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::QAR1(H)
- R(b);XP(C)::QAB1(H)
- B(f);XP(G)::QAR1(H)
- P(e);XB(F)::QAR1(H)
- R(g);::QAB1(H)
- S(h);::QAB1(H)
- R(b);S_CUTB(a)::S(E),XP(d)
- R(g);N_GUARD::QAR1(H)
- B(a);::QAB1(H)
- Refutation
- B(f);
- Try
- B(F);XP(e)
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::QAR1(H)
- R(b);XP(C)::QAB1(H)
- B(f);XP(G)::QAR1(H)
- R(g);::QAB1(H)
- S(h);::QAB1(H)
- R(b);S_CUTB(a)::S(E),XP(d)
- R(g);N_GUARD::QAR1(H)
- B(a);::QAB1(H)
- Refutation
- B(f);
- Try
- R(B);CHECK
- Vars
- R(b);P_SPINR(b)::S(E)
- B(a);N_GUARD,P_SPINB(a)::R1(B),XB(a)
- Refutation
- K(c);S_FLIGHT
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(b);XR(B)::S(E),XP(d)
- R(g);N_GUARD,XB(I)::QAR1(H)
- B(a);XR(B)::S(E)
- R(g);S_CUTB(f)::QAB1(H)
- B(f);S_CUTR(g)::QAR1(H)
- R(g);N_GUARD::QAR1(H),XR(g)
- R(g);N_GUARD,P_PINS(E)::QAR1(H)
- Refutation
- S(h);
- Try
- R(D);CHECK
- Vars
- B(a);P_SPINB(a)::S(E),XP(d)
- B(f);XR(D)::QAB1(H)
- Refutation
- P(d);P_SPINP(d)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(b);XP(G)::QAB1(H)
- B(f);XP(G)::QAB1(H)
- R(b);S_CUTB(a)::QAR1(H)
- R(b);N_GUARD::S(E)
- B(f);::QAB1(H)
- P(d);::QAB1(H)
- Refutation
- B(a);
- Try
- Q(H);CHECK
- Vars
- P(d);SBLOCK,XQ(H)::S(E)
- Refutation
- B(a);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- R(b);XP(C)::QAB1(H)
- R(b);N_GUARD::S(E),XR(b)
- R(g);::QAB1(H)
- S(h);::QAB1(H)
- P(e);::QAB1(H)
- Refutation
- P(e);XQ(H)
- Try
- Q(H);CHECK
- Refutation
- S(h);XQ(H)
- Try
- Actual
- B(I);
- Threat
- DUALS(2)
- Vars
- R(b);XP(C)::QAB1(H)
- R(g);XB(I)::QAB1(H)
- B(f);XB(I)::QAR1(H)
- R(b);S_CUTB(a)::S(E),XP(d)
- B(a);S_CUTR(b)::S(E)
- R(g);::QAR1(H)
- B(a);::QAB1(H)
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).