MESON Chess Problem Database
Problem Display
PID: 231159 (7K/7B/8/6p1/N3R1p1/2Np2pb/Rnpk2n1/b4Q2 w - - 0 1)
Levman, Semyon Semyonovich
2nd HM., Volk und Zeit, 1927
#2
7 + 10
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qxd1#
- 1...Sc4
- 2.Qd1#
- 1...Se1
- 2.Qxe1#
- 1...Sf4
- 2.Qe1#
- 1...Sh4
- 2.Qe1#
- 1...c1S
- 2.Qd1#
- 1...c1B
- 2.Qd1#
- 1...Sd1
- Tries
- 1.Rxb2?
- threat
- 2.Sb1#
- 2.Qd1#
- 1...Se1
- 2.Qxe1#
- 1...Se3
- 2.Sb1#
- 1...Bxb2!
- threat
- 1.Re6?
- 1...Sd1
- 2.Qxd1#
- 1...Se1
- 2.Qxe1#
- 1...c1Q
- 2.Qxd3#
- 1...c1S
- 2.Qd1#
- 1...c1B
- 2.Qxd3#
- 2.Qd1#
- 1...c1R
- 2.Qxd3#
- 1...Sc4
- 2.Qd1#
- 1...Se3
- 2.Se4#
- 1...Sf4
- 2.Qe1#
- 1...Sh4
- 2.Qe1#
- 1...Sxa4!
- 1...Sd1
- 1.Re7?
- 1...Sd1
- 2.Qxd1#
- 1...Se1
- 2.Qxe1#
- 1...c1Q
- 2.Qxd3#
- 1...c1S
- 2.Qd1#
- 1...c1B
- 2.Qxd3#
- 2.Qd1#
- 1...c1R
- 2.Qxd3#
- 1...Sc4
- 2.Qd1#
- 1...Se3
- 2.Se4#
- 1...Sf4
- 2.Qe1#
- 1...Sh4
- 2.Qe1#
- 1...Sxa4!
- 1...Sd1
- 1.Re8?
- 1...Sd1
- 2.Qxd1#
- 1...Se1
- 2.Qxe1#
- 1...c1Q
- 2.Qxd3#
- 1...c1S
- 2.Qd1#
- 1...c1B
- 2.Qxd3#
- 2.Qd1#
- 1...c1R
- 2.Qxd3#
- 1...Sc4
- 2.Qd1#
- 1...Se3
- 2.Se4#
- 1...Sf4
- 2.Qe1#
- 1...Sh4
- 2.Qe1#
- 1...Sxa4!
- 1...Sd1
- 1.Qe2+?
- 1...Kc1
- 2.Rxa1#
- 1...dxe2!
- 1...Kc1
- 1.Qxg2+?
- 1...Kc1
- 2.Rxa1#
- 1...Bxg2!
- 1...Kc1
- 1.Qf2+?
- 1...Kc1
- 2.Rxa1#
- 1...gxf2!
- 1...Kc1
- 1.Rxb2?
- Keys
- 1.Re5!
- 1...Sxa4
- 2.Sb1#
- 1...Sd1
- 2.Qxd1#
- 1...Se1
- 2.Qxe1#
- 1...c1Q
- 2.Qxd3#
- 1...c1S
- 2.Qd1#
- 1...c1B
- 2.Qxd3#
- 2.Qd1#
- 1...c1R
- 2.Qxd3#
- 1...Sc4
- 2.Sb1#
- 2.Qd1#
- 1...Se3
- 2.Se4#
- 1...Sf4
- 2.Qe1#
- 1...Sh4
- 2.Qe1#
- 1...Sxa4
- 1.Re5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A),XS(b)
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- P(c);N_GUARD,P_SPINS(b)::QAR1(A)
- Tries
- Try
- R(B);P_PINP(c),XS(b)
- Threat
- DUALS(2)
- Vars
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);::S(C)
- Refutation
- B(a);N_SPINP(c),P_PINS(C),XR(B)
- Try
- R(E);
- Vars
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A),XS(b)
- S(e);N_GUARD::QAB1(A),XS(e)
- P(c);P_SPINS(b),SBLOCK::QAR1(A),XP(f)
- P(c);N_GUARD,P_SPINS(b)::QAR1(A)
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A)
- S(e);SBLOCK::S(C)
- S(e);N_GUARD::QAB1(A)
- Refutation
- S(b);P_PINS(C),P_SPINP(c),XS(D)
- Try
- R(E);
- Vars
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A),XS(b)
- S(e);N_GUARD::QAB1(A),XS(e)
- P(c);P_SPINS(b),SBLOCK::QAR1(A),XP(f)
- P(c);N_GUARD,P_SPINS(b)::QAR1(A)
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A)
- S(e);SBLOCK::S(C)
- S(e);N_GUARD::QAB1(A)
- Refutation
- S(b);P_PINS(C),P_SPINP(c),XS(D)
- Try
- R(E);
- Vars
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A),XS(b)
- S(e);N_GUARD::QAB1(A),XS(e)
- P(c);P_SPINS(b),SBLOCK::QAR1(A),XP(f)
- P(c);N_GUARD,P_SPINS(b)::QAR1(A)
- S(b);N_GUARD,P_PINS(C),P_SPINP(c)::QAR1(A)
- S(e);SBLOCK::S(C)
- S(e);N_GUARD::QAB1(A)
- Refutation
- S(b);P_PINS(C),P_SPINP(c),XS(D)
- Try
- Q(A);CHECK
- Vars
- K(d);S_FLIGHT::R(B),XB(a)
- Refutation
- P(f);XQ(A)
- Try
- Q(A);CHECK,XS(e)
- Vars
- K(d);S_FLIGHT::R(B),XB(a)
- Refutation
- B(h);XQ(A)
- Try
- Q(A);CHECK
- Vars
- K(d);S_FLIGHT::R(B),XB(a)
- Refutation
- P(g);XQ(A)
- Try
- Actual
- R(E);
- Vars
- S(b);P_SPINP(c),XS(D)::S(C)
- S(b);N_GUARD,P_SPINP(c)::QAR1(A),XS(b)
- S(e);N_GUARD::QAB1(A),XS(e)
- P(c);P_SPINS(b),SBLOCK::QAR1(A),XP(f)
- P(c);N_GUARD,P_SPINS(b)::QAR1(A)
- S(e);SBLOCK::S(C)
- S(e);N_GUARD::QAB1(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).