MESON Chess Problem Database
Problem Display
PID: 122755 (3Nb2K/4Q1p1/7b/1p1r3p/2pk2q1/4R1n1/2R3B1/3r2B1 w - - 0 1)
Zepler, Erich Ernest
Deutsches Wochenschach, 1921
#2
7 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Se6#
- 1...Qf3
- 2.Se6#
- 1...Qe6
- 2.Sxe6#
- 1...Qf4
- 2.Se6#
- 1...Qh4
- 2.Se6#
- 1...Qg5
- 2.Se6#
- 1...Ra1
- 2.Rd2#
- 1...Rb1
- 2.Rd2#
- 1...Rc1
- 2.Rd2#
- 1...Re1
- 2.Rd2#
- 1...Rf1
- 2.Rd2#
- 1...Rxg1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Rd3
- 2.Re4#
- 1...Re5
- 2.Qxe5#
- 1...Rf5
- 2.Se6#
- 1...Rd6
- 2.Qxd6#
- 2.Qe5#
- 1...Rd7
- 2.Sc6#
- 2.Qe5#
- 1...Rxd8
- 2.Qe5#
- 2.Qa7#
- 1...Bxe3
- 2.Qxe3#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Sf5
- 2.Se6#
- 1...c3
- 2.Qb4#
- 1...Qe2
- Tries
- 1.Rcc3?
- threat
- 2.Red3#
- 1...Bxe3
- 2.Qxe3#
- 1...Rd3
- 2.Rexd3#
- 1...Qe6
- 2.Sxe6#
- 1...Rxg1!
- threat
- 1.Re1+?
- 1...Be3
- 2.Qxe3#
- 1...Kd3!
- 1...Be3
- 1.Ra3+?
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...Rxg1!
- 1...Be3
- 1.Rb3+?
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...Rxg1!
- 1...Be3
- 1.Rec3+?
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...Rxg1!
- 1...Be3
- 1.Rf3+?
- 1...Be3
- 2.Qxe3#
- 1...Rxg1!
- 1...Be3
- 1.Rxg3+?
- 1...Be3
- 2.Qxe3#
- 1...Rxg1!
- 1...Be3
- 1.Re5+?
- 1...Rxg1
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Kd3!
- 1...Rxg1
- 1.Rcc3?
- Keys
- 1.Qa3!
- threat
- 2.Re4#
- 1...Rxg1
- 2.Rd2#
- 1...Rxd8
- 2.Qa7#
- 1...Bxe3
- 2.Qxe3#
- 1...Qe4
- 2.Rxe4#
- 1...Se4
- 2.Rxe4#
- 1...c3
- 2.Qb4#
- 2.Qxc3#
- 1...Qf3
- 2.Se6#
- 1...Rc5
- 2.Qc3#
- 1...Re5
- 2.Rd3#
- 1...Rf5
- 2.Se6#
- 1...Rg5
- 2.Re1#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Sc6#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 17
- Sets
- Q(e);N_GUARD::S(F)
- Q(e);N_GUARD::S(F),XQ(e)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD,XB(A)::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::B(A)+R(D),DCHECK
- R(g);N_GUARD::QAB1(E),XR(g)
- R(g);S_CUTQ(e)::S(F)
- B(i);OGATE,P_SPINB(i),XR(D)::QAB1(E),XB(i)
- B(k);N_GUARD::S(F),XB(k)
- B(k);N_GUARD::S(F)
- S(b);S_CUTQ(e)::S(F)
- P(c);OGATEB::QAR2(E)
- Tries
- Try
- R(B);
- Threat
- B(A)+R(D),DCHECK
- Vars
- B(i);OGATE,P_SPINB(i),XR(D)::QAB1(E),XB(i)
- R(a);::B(A)+R(D),DCHECK,XR(a)
- Q(e);N_GUARD::S(F),XQ(e)
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK
- Vars
- B(i);N_GUARD,P_SPINB(i)::QAB1(E),XB(i)
- Refutation
- K(d);P-FLIGHT
- Try
- R(D);CHECK
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK
- Vars
- B(i);N_GUARD,P_SPINB(i)::QAB1(E),XB(i)
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK,XS(b)
- Vars
- B(i);N_GUARD,P_SPINB(i)::QAB1(E),XB(i)
- Refutation
- R(a);XB(A)
- Try
- R(D);CHECK
- Vars
- R(a);XB(A)::R1(D),XR(g)
- B(i);P_SPINB(i)::R1(D),XR(g)
- Refutation
- K(d);P-FLIGHT
- Try
- Actual
- Q(E);
- Threat
- B(A)+R(D),DCHECK
- Vars
- R(a);N_GUARD,XB(A)::R(B)
- R(g);N_GUARD,XS(F)::QAB(E)
- B(i);OGATE,P_SPINB(i),XR(D)::QAB1(E),XB(i)
- Q(e);::B(A)+R(D),DCHECK,XQ(e)
- S(b);::B(A)+R(D),DCHECK,XS(b)
- Q(e);N_GUARD::S(F)
- R(g);SBLOCK::QAB1(E)
- R(g);SBLOCK::B(A)+R(D),DCHECK
- R(g);S_CUTQ(e)::S(F)
- R(g);S_CUTB(i)::B(A)+R(D)
- R(g);OGATEB::QAR2(E),XR(g)
- R(g);S_CUTB(k)::S(F)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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