MESON Chess Problem Database
Problem Display
PID: 105374 (1nr5/R6p/1Bk3bR/2Pq4/P1N5/2b1P2B/2N3Q1/1K6 w - - 0 1)
Fjellstrom, Zakarias
BCF, 1952
#2
11 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Bxg2#
- 1...Qf3
- 2.Qxf3#
- 1...Qe4
- 2.Qxe4#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sa5#
- 1...Be1
- 2.Se5#
- 1...Bb2
- 2.Sa5#
- 1...Bd2
- 2.Se5#
- 1...Bb4
- 2.Se5#
- 1...Bd4
- 2.Sa5#
- 1...Ba5
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sa5#
- 1...Bg7
- 2.Sa5#
- 1...Bh8
- 2.Sa5#
- 1...Sa6
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Qxg2
- Tries
- 1.Bg4?
- 1...Qf3
- 2.Bxf3#
- 2.Qxf3#
- 1...Qe4
- 2.Qxe4#
- 1...Be1
- 2.Se5#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sa5#
- 1...Bb2
- 2.Sa5#
- 1...Bd2
- 2.Se5#
- 1...Bb4
- 2.Se5#
- 1...Bd4
- 2.Sa5#
- 1...Ba5
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sa5#
- 1...Bg7
- 2.Sa5#
- 1...Bh8
- 2.Sa5#
- 1...Sa6
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Qxg2!
- 1...Qf3
- 1.Bf5?
- 1...Qf3
- 2.Qxf3#
- 1...Qe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Be1
- 2.Sd4#
- 2.Se5#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sb4#
- 2.Sa5#
- 1...Bb2
- 2.Sb4#
- 2.Sa5#
- 1...Bd2
- 2.Sd4#
- 2.Se5#
- 1...Bb4
- 2.Sxb4#
- 2.Sd4#
- 2.Se5#
- 1...Bd4
- 2.Sb4#
- 2.Sxd4#
- 2.Sa5#
- 1...Ba5
- 2.Sd4#
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sb4#
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sb4#
- 2.Sa5#
- 1...Bg7
- 2.Sb4#
- 2.Sa5#
- 1...Bh8
- 2.Sb4#
- 2.Sa5#
- 1...Sa6
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Qxg2!
- 1...Qf3
- 1.Bxc8?
- threat
- 2.Rc7#
- 1...Qf3
- 2.Qxf3#
- 1...Qe4
- 2.Qxe4#
- 1...Be5
- 2.Sa5#
- 2.Sxe5#
- 1...Sa6
- 2.Bd7#
- 1...Qxg2!
- threat
- 1.Rxg6+?
- 1...Bf6
- 2.Sb4#
- 2.Sd4#
- 2.Sa5#
- 2.Se5#
- 2.Rxf6#
- 1...hxg6!
- 1...Bf6
- 1.Qh1?
- 1...Qg2
- 2.Bxg2#
- 2.Qxg2#
- 1...Qf3
- 2.Qxf3#
- 1...Qe4
- 2.Qxe4#
- 1...Sa6
- 2.Bd7#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sa5#
- 1...Be1
- 2.Se5#
- 1...Bb2
- 2.Sa5#
- 1...Bd2
- 2.Se5#
- 1...Bb4
- 2.Se5#
- 1...Bd4
- 2.Sa5#
- 1...Ba5
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sa5#
- 1...Bg7
- 2.Sa5#
- 1...Bh8
- 2.Sa5#
- 1...Sd7
- 2.Bxd7#
- 1...Qxh1+!
- 1...Qg2
- 1.Qf3?
- 1...Qe4
- 2.Qxe4#
- 1...Sa6
- 2.Bd7#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sa5#
- 1...Be1
- 2.Se5#
- 1...Bb2
- 2.Sa5#
- 1...Bd2
- 2.Se5#
- 1...Bb4
- 2.Se5#
- 1...Bd4
- 2.Sa5#
- 1...Ba5
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sa5#
- 1...Bg7
- 2.Sa5#
- 1...Bh8
- 2.Sa5#
- 1...Sd7
- 2.Bxd7#
- 1...Qxf3!
- 1...Qe4
- 1.Qe4?
- 1...Sa6
- 2.Bd7#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sb4#
- 2.Sa5#
- 1...Be1
- 2.Sd4#
- 2.Se5#
- 1...Bb2
- 2.Sb4#
- 2.Sa5#
- 1...Bd2
- 2.Sd4#
- 2.Se5#
- 1...Bb4
- 2.Sxb4#
- 2.Sd4#
- 2.Se5#
- 1...Bd4
- 2.Sb4#
- 2.Sxd4#
- 2.Sa5#
- 1...Ba5
- 2.Sd4#
- 2.Sxa5#
- 2.Se5#
- 1...Be5
- 2.Sb4#
- 2.Sa5#
- 2.Sxe5#
- 1...Bf6
- 2.Sb4#
- 2.Sa5#
- 1...Bg7
- 2.Sb4#
- 2.Sa5#
- 1...Bh8
- 2.Sb4#
- 2.Sa5#
- 1...Sd7
- 2.Bxd7#
- 1...Qxe4!
- 1...Sa6
- 1.Qxg6+?
- 1...Qe6
- 2.Bg2#
- 2.Qe4#
- 2.Qg2#
- 2.Qxe6#
- 1...Qd6
- 2.Bg2#
- 2.Qe4#
- 2.Qg2#
- 2.Qxd6#
- 1...Bf6
- 2.Sb4#
- 2.Sa5#
- 1...hxg6!
- 1...Qe6
- 1.Bg4?
- Keys
- 1.Ka2!
- 1...Qxg2
- 2.Bxg2#
- 1...Qf3
- 2.Qxf3#
- 1...Qe4
- 2.Qxe4#
- 1...Rc7
- 2.Rxc7#
- 1...Rd8
- 2.Rc7#
- 1...Re8
- 2.Rc7#
- 1...Rf8
- 2.Rc7#
- 1...Rg8
- 2.Rc7#
- 1...Rh8
- 2.Rc7#
- 1...Ba1
- 2.Sb4#
- 1...Be1
- 2.Sd4#
- 1...Bb2
- 2.Sb4#
- 1...Bd2
- 2.Sd4#
- 1...Bb4
- 2.Sxb4#
- 2.Sd4#
- 1...Bd4
- 2.Sb4#
- 2.Sxd4#
- 1...Ba5
- 2.Sd4#
- 1...Be5
- 2.Sb4#
- 1...Bf6
- 2.Sb4#
- 1...Bg7
- 2.Sb4#
- 1...Bh8
- 2.Sb4#
- 1...Sa6
- 2.Bd7#
- 1...Sd7
- 2.Bxd7#
- 1...Qxg2
- 1.Ka2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(b);N_SPINQ(b),OGATE,XQ(C)::B(E),XQ(b)
- Q(b);OGATEB::QAB(C),XQ(b)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- B(a);N_GUARD::S(G)
- B(a);N_GUARD,N_SPINB(d)::S(G)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Tries
- Try
- B(E);
- Vars
- Q(b);OGATEB::QAB(C),XQ(b)
- B(a);N_GUARD::S(G)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- B(a);N_GUARD,N_SPINB(d)::S(G)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- B(E);N_SPINS(B)
- Vars
- Q(b);OGATEB::QAB(C),XQ(b)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- B(E);XR(g)
- Threat
- R1(K)
- Vars
- Q(b);OGATEB::QAB(C),XQ(b)
- S(f);N_GUARD::B(E)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- R(J);CHECK,N_SPINS(B),XB(d)
- Refutation
- P(e);XR(J)
- Try
- Q(C);
- Vars
- Q(b);OGATEB::QAB(C),XQ(b)
- S(f);N_GUARD::B(E)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- B(a);N_GUARD::S(G)
- B(a);N_GUARD,N_SPINB(d)::S(G)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XQ(C)
- Try
- Q(C);
- Vars
- Q(b);OGATEB::QAB(C),XQ(b)
- S(f);N_GUARD::B(E)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- B(a);N_GUARD::S(G)
- B(a);N_GUARD,N_SPINB(d)::S(G)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- Q(C);N_SPINS(B)
- Vars
- S(f);N_GUARD::B(E)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- S(f);N_GUARD::B(E),XS(f)
- Refutation
- Q(b);N_SPINQ(b),P_PINS(B),XQ(C)
- Try
- Q(C);CHECK,N_PINQ(b),N_SPINS(B),XB(d)
- Refutation
- P(e);P_SPINP(e),XQ(C)
- Try
- Actual
- K(A);N_SPINS(B),P_SPINS(G),S_FLIGHT
- Vars
- Q(b);N_PINS(G),N_SPINQ(b),OGATE,P_PINS(B),XQ(C)::B(E),XQ(b)
- Q(b);N_PINS(G),OGATEB::QAB(C),XQ(b)
- R(g);N_GUARD::R1(K),XR(g)
- R(g);N_GUARD::R1(K)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD,N_SPINB(d)::S(B)
- S(f);N_GUARD::B(E)
- S(f);N_GUARD::B(E),XS(f)
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).