MESON Chess Problem Database
Problem Display
PID: 86235 (1K2N3/8/1ppQ1Nn1/1p6/1Pk1bq1R/PRB5/P1n1P3/5B2 w - - 0 1)
Loshinski, Lev Ilich
Original, 1931
#2
12 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Qd3#
- 2.Qxc6#
- 2.Qe6#
- 1...Qd2
- 2.Qxc6#
- 1...Qe3
- 2.Qe6#
- 1...Qg3
- 2.e3#
- 1...Qe5
- 2.e3#
- 1...Qg5
- 2.Qd3#
- 2.e3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Qh6
- 2.Qd3#
- 2.Qxc6#
- 2.Qe6#
- 2.e3#
- 1...Qxf1
- 2.Qd3#
- 2.Qxc6#
- 2.Qe6#
- 1...Qf2
- 2.Qd3#
- 2.Qe6#
- 1...Qf3
- 2.Qxc6#
- 2.Qe6#
- 2.exf3#
- 1...Qf5
- 2.Qd3#
- 1...Qxf6
- 2.Qd3#
- 1...Bh1
- 2.e3#
- 1...Bd3
- 2.exd3#
- 1...Bf3
- 2.exf3#
- 1...Bd5
- 2.e3#
- 1...Qc1
- Tries
- 1.Sd7?
- threat
- 2.Sxb6#
- 1...Qe3
- 2.Qe6#
- 1...Qf2
- 2.Qd3#
- 2.Qe6#
- 1...Qxd6+!
- threat
- 1.Ba1?
- threat
- 2.Rc3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qd3#
- 1...Qd2
- 2.Qxc6#
- 1...Qe3
- 2.Qe6#
- 1...Qg3
- 2.e3#
- 1...Qe5
- 2.e3#
- 1...Qf3
- 2.Qxc6#
- 2.Qe6#
- 2.exf3#
- 1...Bd5
- 2.e3#
- 1...Sxa1!
- threat
- 1.Be5?
- threat
- 2.Rc3#
- 1...Qxe5
- 2.e3#
- 1...Qd2
- 2.Qxc6#
- 1...Qe3
- 2.Qe6#
- 1...Qg3
- 2.Qxc6#
- 2.Qe6#
- 2.e3#
- 1...Qf3
- 2.Qxc6#
- 2.Qe6#
- 2.exf3#
- 1...Sd4
- 2.Qxd4#
- 1...Sxe5!
- threat
- 1.Rxf4?
- threat
- 2.Qd3#
- 2.Qxc6#
- 2.Qe6#
- 2.e3#
- 1...Sxb4
- 2.Rxe4#
- 2.Qxb4#
- 2.Qd4#
- 1...Se1
- 2.Rxe4#
- 2.Qd4#
- 2.Qxc6#
- 2.Qe6#
- 1...Se3
- 2.Rxe4#
- 2.Qd3#
- 2.Qd4#
- 2.Qxc6#
- 1...Sd4
- 2.Qxd4#
- 1...Se5
- 2.Qe6#
- 1...Se7
- 2.Qd3#
- 2.e3#
- 1...Sf8
- 2.Qd3#
- 2.Qxc6#
- 2.e3#
- 1...c5
- 2.Qd3#
- 2.Qd5#
- 2.Qe6#
- 2.e3#
- 1...Sxf4!
- threat
- 1.Qxf4?
- threat
- 2.Sd6#
- 2.e3#
- 1...Sxf4
- 2.Sd6#
- 1...Se1
- 2.Sd6#
- 2.Qxe4#
- 1...Se3
- 2.Sd6#
- 2.Qxe4#
- 1...Sd4
- 2.Sd6#
- 1...Se5
- 2.Sd6#
- 1...Sxb4!
- threat
- 1.e3+?
- 1...Bd3
- 2.Bxd3#
- 1...Qxf1!
- 1...Bd3
- 1.Sd7?
- Keys
- 1.Bb2!
- threat
- 2.Rc3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Qxf6
- 2.Qd3#
- 1...Qd2
- 2.Qxc6#
- 1...Qe3
- 2.Qe6#
- 1...Qg3
- 2.e3#
- 1...Qe5
- 2.e3#
- 1...Qf3
- 2.Qxc6#
- 2.Qe6#
- 2.exf3#
- 1...Bd5
- 2.e3#
- threat
- 1.Bb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(d);N_PINQ(I),P_SPINB(c)::QAR2(I),XP(g)
- Q(d);N_PINQ(I),P_SPINB(c)::QAB(I)
- Q(d);N_GUARD,P_SPINB(c)::B(A)+P(C)
- Q(d);CHECK,P_SPINB(c),XQ(I)::S(L),XQ(d)
- Q(d);N_PINQ(I),P_SPINB(c)::QAB1(I)
- Q(d);N_PINQ(I),P_SPINB(c),XS(J)::QAB1(I)
- B(c);N_GUARD,P_SPINQ(d)::B(A)+P(C)
- B(c);OGATE,P_SPINQ(d)::P(C),XB(c)
- B(c);OGATE,P_SPINQ(d)::B(A)+P(C),XB(c)
- Tries
- Try
- S(J);
- Threat
- S(J),XP(f)
- Vars
- Q(d);N_PINQ(I),P_SPINB(c)::QAB(I)
- Refutation
- Q(d);CHECK,P_SPINB(c),XQ(I)
- Try
- B(F);
- Threat
- R1(E)
- Vars
- Q(d);CHECK,P_SPINB(c),XQ(I)::S(L),XQ(d)
- Q(d);N_PINQ(I),P_SPINB(c),XS(J)::QAB1(I)
- Q(d);N_PINQ(I),P_SPINB(c)::QAR2(I),XP(g)
- Q(d);N_PINQ(I),P_SPINB(c)::QAB(I)
- Q(d);N_GUARD,P_SPINB(c)::B(A)+P(C)
- B(c);N_GUARD,P_SPINQ(d)::B(A)+P(C)
- Refutation
- S(a);XB(F)
- Try
- B(F);N_SPINQ(I)
- Threat
- R1(E)
- Vars
- Q(d);N_GUARD,P_PINQ(I),P_SPINB(c),XB(F)::B(A)+P(C)
- Q(d);P_SPINB(c)::QAR2(I),XP(g)
- Q(d);P_SPINB(c)::QAB(I)
- S(a);N_GUARD::QAR1(I),XS(a)
- Refutation
- S(h);XB(F)
- Try
- R(H);N_SPINQ(I),P_PINB(c),XQ(d)
- Threat
- DUALS(4)
- Vars
- S(a);N_GUARD,N_SPINB(c)::QAR1(I),XS(a)
- S(h);::QAB(I)
- Refutation
- S(h);N_SPINB(c),XR(H)
- Try
- Q(I);N_SPINQ(I),P_PINB(c),XQ(d)
- Threat
- DUALS(2)
- Vars
- S(h);N_SPINB(c),XQ(I)::S(L)
- S(a);N_SPINB(c)::S(L)
- S(h);::S(L)
- Refutation
- S(a);XP(G)
- Try
- P(C);CHECK
- Vars
- B(c);N_GUARD,P_SPINB(c),P_SPINQ(d)::B(A),XB(c)
- Refutation
- Q(d);N_PINQ(I),P_SPINB(c),XB(A)
- Try
- Actual
- B(F);
- Threat
- R1(E)
- Vars
- Q(d);CHECK,P_SPINB(c),XQ(I)::S(L),XQ(d)
- Q(d);N_PINQ(I),P_SPINB(c),XS(J)::QAB1(I)
- Q(d);N_PINQ(I),P_SPINB(c)::QAR2(I),XP(g)
- Q(d);N_PINQ(I),P_SPINB(c)::QAB(I)
- Q(d);N_GUARD,P_SPINB(c)::B(A)+P(C)
- B(c);N_GUARD,P_SPINQ(d)::B(A)+P(C)
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).