MESON Chess Problem Database
Problem Display
PID: 142969 (5Rq1/1b1R1n2/N3B1p1/1Q6/4k2r/1Kb1P1n1/1N2PP1B/2r5 w - - 0 1)
Blikeng, Bjarne
Recomm., BCF 060. Ty., 1948-1949
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Rd4#
- 1...Bd2
- 2.Rd4#
- 1...Bb4
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Ba5
- 2.Rd4#
- 1...Be5
- 2.Qd3#
- 1...Bd5+
- 2.Qxd5#
- 1...Bxa6
- 2.Qd5#
- 1...Bc8
- 2.Qd5#
- 1...Sf1
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...Sh1
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...Sxe2
- 2.Qxb7#
- 1...Sf5
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...Sh5
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...Se5
- 2.Sc5#
- 1...Be1
- Tries
- 1.Sc4?
- threat
- 2.Sc5#
- 2.Qxb7#
- 2.f3#
- 1...Qxf8
- 2.Qxb7#
- 2.f3#
- 1...Bxa6
- 2.Qc6#
- 2.Qd5#
- 2.f3#
- 1...Sxe2
- 2.Qxb7#
- 1...Rd1
- 2.Sc5#
- 2.f3#
- 1...Rf1
- 2.Sc5#
- 2.Qxb7#
- 1...Rf4
- 2.Sc5#
- 2.Qxb7#
- 1...Rh5
- 2.f3#
- 1...Bb4
- 2.Rd4#
- 2.Qxb7#
- 2.f3#
- 1...Bd4
- 2.Sd2#
- 2.Rxd4#
- 2.Qxb7#
- 2.f3#
- 1...Bd5
- 2.Sc5#
- 2.Qxd5#
- 2.f3#
- 1...Bc6
- 2.Sc5#
- 2.Qxc6#
- 2.f3#
- 1...Ba8
- 2.Sc5#
- 2.f3#
- 1...Bc8
- 2.Sc5#
- 2.Qc6#
- 2.Qd5#
- 2.f3#
- 1...Se5
- 2.Sd6#
- 2.Sc5#
- 1...Sg5
- 2.Sd6#
- 2.Sc5#
- 2.Qxb7#
- 1...Sd6
- 2.Sxd6#
- 2.Sc5#
- 2.f3#
- 1...Sd8
- 2.Sd6#
- 2.Sc5#
- 2.f3#
- 1...Rb1+!
- threat
- 1.Bxg3?
- threat
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...Bd5+
- 2.Qxd5#
- 1...Qxf8
- 2.Qd3#
- 2.Qxb7#
- 1...Bxb2
- 2.Qd3#
- 1...Bxa6
- 2.Qc6#
- 2.Qd5#
- 1...Rd1
- 2.Sc5#
- 1...Rh5
- 2.Qd3#
- 1...Be1
- 2.Rd4#
- 2.Qd3#
- 1...Bd2
- 2.Rd4#
- 2.Qd3#
- 1...Bb4
- 2.Rd4#
- 2.Qd3#
- 1...Bd4
- 2.Rxd4#
- 2.Qd3#
- 1...Ba5
- 2.Rd4#
- 2.Qd3#
- 1...Be5
- 2.Qd3#
- 1...Bf6
- 2.Qd3#
- 1...Bg7
- 2.Qd3#
- 1...Bh8
- 2.Qd3#
- 1...Bc6
- 2.Sc5#
- 2.Qd3#
- 2.Qxc6#
- 1...Ba8
- 2.Sc5#
- 2.Qd3#
- 1...Bc8
- 2.Sc5#
- 2.Qd3#
- 2.Qc6#
- 2.Qd5#
- 1...Se5
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 2.Qd3#
- 1...Sd8
- 2.Sc5#
- 2.Qd3#
- 1...Rf4!
- threat
- 1.Bf5+?
- 1...Sxf5
- 2.Sc5#
- 2.Qd3#
- 2.Qxb7#
- 1...gxf5!
- 1...Sxf5
- 1.Qc4+?
- 1...Bd4
- 2.Qxd4#
- 1...Ke5!
- 1...Bd4
- 1.Qf5+?
- 1...Sxf5
- 2.Sc5#
- 1...gxf5!
- 1...Sxf5
- 1.Qg5?
- threat
- 2.Sc5#
- 2.f3#
- 1...Bd5+
- 2.Bxd5#
- 2.Qxd5#
- 1...Qxf8
- 2.f3#
- 1...Bxb2
- 2.f3#
- 1...Bxa6
- 2.Bd5#
- 2.Qd5#
- 2.f3#
- 1...Sxe2
- 2.Qg2#
- 1...Rf1
- 2.Sc5#
- 1...Rf4
- 2.Sc5#
- 2.Qxf4#
- 1...Be1
- 2.Rd4#
- 2.f3#
- 1...Bd2
- 2.Rd4#
- 2.f3#
- 1...Bb4
- 2.Rd4#
- 2.f3#
- 1...Bd4
- 2.Rxd4#
- 2.f3#
- 1...Ba5
- 2.Rd4#
- 2.f3#
- 1...Be5
- 2.f3#
- 1...Bf6
- 2.f3#
- 1...Bg7
- 2.f3#
- 1...Bh8
- 2.f3#
- 1...Se5
- 2.Sc5#
- 1...Sxg5!
- threat
- 1.Sc4?
- Keys
- 1.Re7!
- threat
- 2.Bf5#
- 1...Bd5+
- 2.Qxd5#
- 1...Sxe2
- 2.Qxb7#
- 1...Be5
- 2.Qd3#
- 1...Sf5
- 2.Sc5#
- 2.Bd5#
- 2.Bxf5#
- 2.Qd3#
- 2.Qxb7#
- 1...Se5
- 2.Sc5#
- 1...Sg5
- 2.Bd5#
- 1...Sd6
- 2.Bd5#
- 1...Sh6
- 2.Bd5#
- 1...Sd8
- 2.Bd5#
- 1...Sh8
- 2.Bd5#
- threat
- 1.Re7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 7
- Sets
- B(b);N_GUARD::R1(J)
- B(b);N_GUARD::R1(J),XB(b)
- B(b);SBLOCK::QAB1(G)
- B(g);CHECK,N_GUARD::QAB1(G),XB(g)
- B(g);N_GUARD,XS(H)::QAB1(G)
- B(g);N_GUARD::QAB1(G)
- S(c);XP(B)::QAB(G),XB(g)
- S(h);P_PINB(I),SBLOCK::S(H)
- Tries
- Try
- S(A);
- Threat
- DUALS(3)
- Vars
- S(c);XP(B)::QAB(G),XB(g)
- R(e);::P(C)
- Refutation
- R(a);CHECK
- Try
- B(D);XS(c)
- Threat
- DUALS(3)
- Vars
- B(g);CHECK,N_GUARD::QAB1(G),XB(g)
- B(b);XS(A)::QAB1(G)
- R(a);::S(H)
- R(e);::QAB1(G)
- B(b);::QAB1(G)
- S(h);P_PINB(I)::S(H)
- Refutation
- R(e);
- Try
- B(I);CHECK
- Refutation
- P(f);XB(I)
- Try
- Q(G);CHECK
- Vars
- B(b);N_GUARD,P_SPINB(b)::QAR1(G),XB(b)
- Refutation
- K(d);P-FLIGHT,P_SPINS(c)
- Try
- Q(G);CHECK
- Vars
- S(c);XQ(G)::S(H)
- Refutation
- P(f);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(i);XR(K)::P(C)
- B(b);XS(A)::P(C)
- S(c);OGATE,XP(B)::QAB(G)
- R(a);::S(H)
- B(b);::P(C)
- S(h);P_PINB(I)::S(H)
- Refutation
- S(h);P_PINB(I),XQ(G)
- Try
- Actual
- R(J);
- Threat
- R(J)+B(I),DCHECK
- Vars
- B(g);CHECK,N_GUARD::QAB1(G),XB(g)
- S(c);XP(B)::QAB(G),XB(g)
- B(b);SBLOCK::QAB1(G)
- S(h);P_PINB(I),SBLOCK::S(H)
- S(h);P_PINB(I)::R(J)+B(I),DCHECK
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).