MESON Chess Problem Database
Problem Display
PID: 245249 (n1R5/8/N1bP1Qp1/2bk2P1/1pp2pBp/2pn1P1K/N1P1P3/3R4 w - - 0 1)
Chepizhni, Viktor Ivanovich
64 Shakhmatnoe obozrenie, 1968
#2
12 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Bxd6
- 2.Be6#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...Bg1
- Tries
- 1.Kg2?
- 1...Bxd6
- 2.Be6#
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...h3+!
- 1...Bxd6
- 1.Kxh4?
- 1...Bxd6
- 2.Be6#
- 1...Bg1
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...Bf2+!
- 1...Bxd6
- 1.Bf5?
- threat
- 2.Be4#
- 1...Bd7
- 2.Rxc5#
- 1...gxf5!
- threat
- 1.Bd7?
- threat
- 2.Bxc6#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Sc7
- 2.Sxc7#
- 1...Bxd7+!
- threat
- 1.Rd2?
- 1...Bxd6
- 2.Be6#
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...cxd2!
- 1...Bxd6
- 1.Rxd3+?
- 1...Bd4
- 2.S2xb4#
- 2.Rxd4#
- 2.Qxd4#
- 2.Qe6#
- 1...cxd3!
- 1...Bd4
- 1.Rc7?
- 1...Bxd6
- 2.Be6#
- 1...Sxc7
- 2.Sxc7#
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...b3
- 2.Sxc3#
- 1...Sb6!
- 1...Bxd6
- 1.Qf5+?
- 1...Kd4
- 2.Qxc5#
- 1...Kxd6
- 2.Qe6#
- 2.Qxc5#
- 1...gxf5!
- 1...Kd4
- 1.exd3?
- 1...Bxd6
- 2.Be6#
- 1...Sb6
- 2.Sc7#
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.S2xb4#
- 2.Qe6#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...cxd3!
- 1...Bxd6
- 1.e3?
- threat
- 2.Qe6#
- 2.e4#
- 1...Bxe3
- 2.S2xb4#
- 1...Bd7
- 2.Rxc5#
- 2.e4#
- 1...Sc7
- 2.Sxc7#
- 2.e4#
- 1...fxe3!
- threat
- 1.Kg2?
- Keys
- 1.Qxf4!
- 1...Bxd6
- 2.Qe4#
- 1...Sb6
- 2.Sc7#
- 1...Bg1
- 2.S2xb4#
- 1...Bf2
- 2.S2xb4#
- 1...Be3
- 2.S2xb4#
- 1...Bd4
- 2.e4#
- 1...Bb6
- 2.S2xb4#
- 1...Ba7
- 2.S2xb4#
- 1...Ba4
- 2.Rxc5#
- 1...Bb5
- 2.Rxc5#
- 1...Bb7
- 2.Rxc5#
- 1...Bd7
- 2.Rxc5#
- 1...Be8
- 2.Rxc5#
- 1...Sc7
- 2.Sxc7#
- 1...b3
- 2.Sxc3#
- 1...Bxd6
- 1.Qxf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::QAB1(K)
- B(g);SBLOCK,XP(J)::B(G)
- B(i);OGATE::R1(L),XB(g)
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- B(g);SBLOCK,XP(J)::B(G)
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::QAB1(K)
- B(i);OGATE::R1(L),XB(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
- Refutation
- P(f);CHECK
- Try
- K(F);P-FLIGHT,XP(f)
- Vars
- B(g);SBLOCK,XP(J)::B(G)
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::QAB1(K)
- B(i);OGATE::R1(L),XB(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
- Refutation
- B(g);CHECK
- Try
- B(G);
- Threat
- B(G)
- Vars
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- Refutation
- P(j);XB(G)
- Try
- B(G);
- Threat
- B(G),XB(i)
- Vars
- B(i);OGATE::R1(L),XB(g)
- S(k);N_GUARD::S(I),XS(k)
- Refutation
- B(i);CHECK,XB(G)
- Try
- R(A);
- Vars
- B(g);SBLOCK,XP(J)::B(G)
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::QAB1(K)
- B(i);OGATE::R1(L),XB(g)
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
- Refutation
- P(a);N_SPINS(b),XR(A)
- Try
- R(A);CHECK,XS(b)
- Refutation
- P(d);XR(A)
- Try
- R(L);
- Vars
- B(g);SBLOCK,XP(J)::B(G)
- S(k);XR(L)::S(I),XS(k)
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::QAB1(K)
- B(i);OGATE::R1(L),XB(g)
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- P(c);N_GUARD::S(B),XP(a)
- Refutation
- S(k);
- Try
- Q(K);CHECK
- Vars
- K(h);OGATE,P-FLIGHT::QAB1(K),XB(g)
- Refutation
- P(j);XQ(K)
- Try
- P(D);XS(b)
- Vars
- B(g);SBLOCK,XP(J)::B(G)
- S(k);N_GUARD::S(I)
- B(g);N_GUARD::S(B),XP(c)
- B(i);OGATE::R1(L),XB(g)
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
- Refutation
- P(d);P_SPINP(d),XP(D)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- B(g);N_GUARD,XP(D)::S(B),XP(c)
- Refutation
- P(e);XP(D)
- Try
- Actual
- Q(K);XP(e)
- Vars
- B(g);SBLOCK,XP(J)::QAB1(K)
- S(k);N_GUARD::S(I)
- B(g);N_GUARD::S(B),XP(c)
- B(g);N_SPINS(b),SBLOCK::P(D)
- B(i);OGATE::R1(L),XB(g)
- B(i);OGATE,P_PINB(G)::R1(L),XB(g)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::S(B),XP(a)
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).