MESON Chess Problem Database
Problem Display
PID: 287523 (5Q2/3rp3/1b6/r4R2/2P1kPPq/1N4R1/2PP1BPn/1b2K2N w - - 0 1)
Marandiuk, Mikhail Nazarovich
Mat, 1987
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxg3
- 2.Sxg3#
- 1...Ra1
- 2.Re5#
- 1...Ra2
- 2.Re5#
- 1...Ra3
- 2.Re5#
- 1...Ra4
- 2.Re5#
- 1...Rc5
- 2.Re3#
- 1...Re5
- 2.Rxe5#
- 1...Rxf5
- 2.Qxf5#
- 1...Ra6
- 2.Re5#
- 1...Raa7
- 2.Re5#
- 1...Ra8
- 2.Re5#
- 1...Rxd2
- 2.Sxd2#
- 1...Rd4
- 2.Re3#
- 1...Rda7
- 2.d3#
- 1...Rb7
- 2.d3#
- 1...Rc7
- 2.d3#
- 1...Bxf2+
- 2.Sxf2#
- 1...Be3
- 2.Rxe3#
- 1...Bd4
- 2.d3#
- 1...Bc5
- 2.Re5#
- 1...Bc7
- 2.Re3#
- 1...Bd8
- 2.Re3#
- 1...Sf3+
- 2.gxf3#
- 1...Qxg3
- Tries
- 1.Sd4?
- threat
- 2.d3#
- 1...Sf3+
- 2.gxf3#
- 1...Qxg3
- 2.Sxg3#
- 1...Rxf5
- 2.Qxf5#
- 1...Rxd4
- 2.Re3#
- 1...Ra3
- 2.Re5#
- 1...Bxc2!
- threat
- 1.Sc5+?
- 1...Bxc5
- 2.Re5#
- 1...Rxc5!
- 1...Bxc5
- 1.Bc5?
- threat
- 2.Sf2#
- 2.Re5#
- 1...Qxg3+
- 2.Sxg3#
- 1...Sf3+
- 2.gxf3#
- 1...Rxc5
- 2.Sf2#
- 1...Rxd2
- 2.Sxd2#
- 2.Re5#
- 1...Bxc5
- 2.Re5#
- 1...Qg5
- 2.Sf2#
- 2.Re3#
- 1...Qf6
- 2.Sf2#
- 2.Re3#
- 1...Qh5
- 2.Sf2#
- 2.Re3#
- 1...Qh8
- 2.Sf2#
- 2.Re3#
- 1...Rd5
- 2.Sf2#
- 1...Bc7
- 2.Sf2#
- 1...e5
- 2.Sf2#
- 2.Rxe5#
- 1...Sxg4!
- threat
- 1.Bxb6?
- threat
- 2.Sf2#
- 1...Qxg3+
- 2.Sxg3#
- 1...Sf3+
- 2.gxf3#
- 1...Rxf5
- 2.Qxf5#
- 1...Rxd2
- 2.Sxd2#
- 1...Sxg4!
- threat
- 1.Rc5?
- threat
- 2.Re3#
- 2.Qf5#
- 1...Sf3+
- 2.gxf3#
- 1...Qxg3
- 2.Sxg3#
- 2.Qf5#
- 1...Qxg4
- 2.Re3#
- 1...Rxc5
- 2.Re3#
- 1...Bxc5
- 2.Qf5#
- 1...Sxg4
- 2.Qf5#
- 1...Qg5
- 2.Re3#
- 1...Qh3
- 2.Qf5#
- 1...Qh5
- 2.Re3#
- 1...Qh7
- 2.Re3#
- 1...Rd3
- 2.Qf5#
- 1...Rd5
- 2.Re3#
- 1...Sf1
- 2.Qf5#
- 1...e6
- 2.Re3#
- 1...Qf6!
- threat
- 1.Qxe7+?
- 1...Re5
- 2.Qxe5#
- 1...Rxe7
- 2.d3#
- 1...Qxe7!
- 1...Re5
- 1.Qa8+?
- 1...Rad5
- 2.d3#
- 1...Rdd5
- 2.d3#
- 1...Rb7
- 2.d3#
- 1...Rxa8!
- 1...Rad5
- 1.d4?
- threat
- 2.Sd2#
- 2.Re3#
- 1...Sf3+
- 2.gxf3#
- 1...Qxg3
- 2.Sxg3#
- 2.Sd2#
- 1...Rxf5
- 2.Qxf5#
- 1...Rxd4
- 2.Re3#
- 1...Bxd4
- 2.Sd2#
- 1...Sxg4
- 2.Sd2#
- 1...Qh3
- 2.Sd2#
- 1...Sf1!
- threat
- 1.c5?
- threat
- 2.Re3#
- 2.Re5#
- 1...Sf3+
- 2.gxf3#
- 1...Qxg3
- 2.Sxg3#
- 2.Re5#
- 1...Rxc5
- 2.Re3#
- 1...Bxc5
- 2.Re5#
- 1...e5
- 2.Rxe5#
- 1...Qg5
- 2.Re3#
- 1...Qf6
- 2.Re3#
- 1...Qh3
- 2.Re5#
- 1...Qh5
- 2.Re3#
- 1...Qh8
- 2.Re3#
- 1...Rd3
- 2.Re5#
- 1...Rd5
- 2.Re3#
- 1...Bc7
- 2.Re3#
- 1...Sf1
- 2.Re5#
- 1...Sxg4!
- threat
- 1.Sd4?
- Keys
- 1.Bd4!
- threat
- 2.Sf2#
- 2.d3#
- 1...Qxg3+
- 2.Sxg3#
- 1...Sf3+
- 2.gxf3#
- 1...Rxf5
- 2.Qxf5#
- 1...Rxd4
- 2.Sf2#
- 1...Bxc2
- 2.Sf2#
- 1...Bxd4
- 2.d3#
- 1...Sxg4
- 2.d3#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 18
- Sets
- Q(d);P_PINB(E),XR(H)::S(B),XQ(d)
- R(e);N_GUARD::R1(L)
- R(e);S_CUTB(f)::R1(H)
- R(e);N_GUARD::R1(L),XR(e)
- R(e);OGATE,XR(L)::QAB1(M),XR(e)
- R(g);XP(D)::S(G),XR(g)
- R(g);S_CUTB(f)::R1(H)
- R(g);N_GUARD::P(D)
- B(f);CHECK,XB(E)::S(B),XB(f)
- B(f);N_GUARD::R1(H),XB(f)
- B(f);S_CUTR(g)::P(D)
- B(f);S_CUTR(e)::R1(L)
- B(f);N_GUARD::R1(H)
- S(b);CHECK,OGATE::P(F),XS(b)
- Tries
- Try
- S(G);
- Threat
- P(D)
- Vars
- S(b);CHECK,OGATE::P(F),XS(b)
- Q(d);P_PINB(E),XR(H)::S(B),XQ(d)
- R(e);OGATE,XR(L)::QAB1(M),XR(e)
- R(g);SBLOCK,XS(G)::R1(H)
- R(e);N_GUARD::R1(L)
- Refutation
- B(a);XP(C)
- Try
- S(G);CHECK
- Vars
- B(f);XS(G)::R1(L)
- Refutation
- R(e);XS(G)
- Try
- B(E);P_SPINR(H)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XR(H)::S(B),XQ(d)
- S(b);CHECK,OGATE::P(F),XS(b)
- R(e);XB(E)::S(B)
- B(f);XB(E)::R1(L)
- R(g);::S(B)
- B(f);::S(B)
- Refutation
- S(b);XP(K)
- Try
- B(E);P_SPINR(H),XB(f)
- Threat
- S(B)
- Vars
- Q(d);CHECK,XR(H)::S(B),XQ(d)
- S(b);CHECK,OGATE::P(F),XS(b)
- R(e);OGATE,XR(L)::QAB1(M),XR(e)
- R(g);XP(D)::S(G),XR(g)
- Refutation
- S(b);XP(K)
- Try
- R(L);
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,OGATE::P(F),XS(b)
- Q(d);XP(K)::R1(H)
- R(e);XR(L)::R1(H)
- B(f);XR(L)::QAB1(M)
- S(b);XP(K)::QAB1(M)
- Q(d);::R1(H)
- Q(d);::QAB1(M)
- R(g);::QAB1(M)
- R(g);::R1(H)
- S(b);::QAB1(M)
- P(h);::R1(H)
- Refutation
- Q(d);
- Try
- Q(M);CHECK,XP(h)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAR1(M),XR(e)
- R(g);XQ(M)::P(D)
- Refutation
- Q(d);XQ(M)
- Try
- Q(M);CHECK
- Vars
- R(e);P_SPINR(e)::P(D)
- R(g);P_SPINR(g)::P(D)
- Refutation
- R(e);XQ(M)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,OGATE::P(F),XS(b)
- R(e);OGATE,XR(L)::QAB1(M),XR(e)
- R(g);XP(D)::R1(H)
- B(f);XP(D)::S(G)
- S(b);XP(K)::S(G)
- Q(d);::S(G)
- Refutation
- S(b);
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,OGATE::P(F),XS(b)
- R(e);XP(I)::R1(H)
- B(f);XP(I)::R1(L)
- P(h);::R1(L),XP(h)
- Q(d);::R1(H)
- Q(d);::R1(L)
- R(g);::R1(L)
- R(g);::R1(H)
- B(f);::R1(H)
- S(b);::R1(L)
- Refutation
- S(b);XP(K)
- Try
- Actual
- B(E);P_SPINR(H)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XR(H)::S(B),XQ(d)
- S(b);CHECK,OGATE::P(F),XS(b)
- R(e);OGATE,XR(L)::QAB1(M),XR(e)
- R(g);XB(E)::S(B)
- B(a);XP(C)::S(B)
- B(f);XB(E)::P(D)
- S(b);XP(K)::P(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).