MESON Chess Problem Database
Problem Display
PID: 207095 (4R2n/Q7/b1PPPPp1/r3k1K1/r2R4/b1N1P2p/4pBpq/4N1n1 w - - 0 1)
Baumgarten, Ernst
Deutsche Schachblatter, 1984
#2
12 + 12
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Qh1
- 2.Bg3#
- 1...Rc4
- 2.Sd3#
- 1...Rxd4
- 2.Qxd4#
- 1...Rb5
- 2.Sd3#
- 1...Rd5
- 2.Rxd5#
- 1...Bc5
- 2.Rd5#
- 1...Bd3
- 2.Sxd3#
- 1...Bb5
- 2.Rd5#
- 1...Bb7
- 2.Sd3#
- 1...Bc8
- 2.Sd3#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Qg3+
- Tries
- 1.Sb5?
- threat
- 2.Sd3#
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Rxd4
- 2.Qxd4#
- 1...Bxb5!
- threat
- 1.Bxg1?
- threat
- 2.Sf3#
- 2.Bxh2#
- 1...Qf4+
- 2.exf4#
- 1...Sf7+
- 2.exf7#
- 1...Qxg1
- 2.Sf3#
- 1...Rxd4
- 2.Qxd4#
- 1...Rd5
- 2.Bxh2#
- 2.Rxd5#
- 1...Qh1
- 2.Sf3#
- 1...Qg3+!
- threat
- 1.Qc5+?
- 1...Bxc5
- 2.Rd5#
- 1...Rxc5!
- 1...Bxc5
- 1.Qb8?
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Rxd4
- 2.exd4#
- 1...Bxd6
- 2.Qxd6#
- 1...Qh1
- 2.Bg3#
- 1...Rc4
- 2.Sd3#
- 1...Rb5
- 2.Sd3#
- 1...Rc5
- 2.d7#
- 1...Rd5
- 2.Rxd5#
- 1...Bc1
- 2.d7#
- 1...Bb2
- 2.d7#
- 1...Bb4
- 2.Re4#
- 1...Bc5
- 2.Rd5#
- 1...Bd3
- 2.Sxd3#
- 1...Bc4
- 2.Re4#
- 1...Bb5
- 2.Rd5#
- 1...Bb7
- 2.Sd3#
- 1...Bc8
- 2.Sd3#
- 1...Rb4!
- 1...Qg3+
- 1.Qxa6?
- threat
- 2.Sd3#
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Rd5
- 2.Rxd5#
- 1...Rxd4!
- threat
- 1.Qg7?
- threat
- 2.f7#
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Rd5
- 2.Rxd5#
- 1...Rxd4!
- threat
- 1.Sb5?
- Keys
- 1.Qc7!
- 1...Qg3+
- 2.Bxg3#
- 1...Qf4+
- 2.exf4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sf7+
- 2.exf7#
- 1...Rxd4
- 2.exd4#
- 1...Bxd6
- 2.Qxd6#
- 1...Rb4
- 2.d7#
- 1...Qh1
- 2.Bg3#
- 1...Rc4
- 2.Sd3#
- 1...Rb5
- 2.Sd3#
- 1...Rc5
- 2.d7#
- 1...Rd5
- 2.Rxd5#
- 1...Bc1
- 2.d7#
- 1...Bb2
- 2.d7#
- 1...Bb4
- 2.Re4#
- 1...Bc5
- 2.Rd5#
- 1...Bd3
- 2.Sxd3#
- 1...Bc4
- 2.Re4#
- 1...Bb5
- 2.Rd5#
- 1...Bb7
- 2.Sd3#
- 1...Bc8
- 2.Sd3#
- 1...Qg3+
- 1.Qc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- Q(d);N_GUARD::B(B)
- R(g);S_CUTB(j)::S(A)
- R(g);OGATE,XR(E)::QAB1(K),XR(g)
- R(h);S_CUTB(j)::S(A)
- R(h);N_GUARD::R1(E),XR(h)
- B(e);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(A),XB(j)
- B(j);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(A)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- Tries
- Try
- S(C);
- Threat
- S(A)
- Vars
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- R(g);OGATE,XR(E)::QAB1(K),XR(g)
- Refutation
- B(j);XS(C)
- Try
- B(B);XS(a)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- Q(d);XB(B)::S(A)
- R(g);OGATE,XR(E)::QAB1(K),XR(g)
- Q(d);::S(A)
- Refutation
- Q(d);CHECK
- Try
- Q(K);CHECK
- Vars
- B(e);XQ(K)::R1(E)
- Refutation
- R(h);XQ(K)
- Try
- Q(K);
- Vars
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- R(g);OGATE,XR(E)::P(D),XR(g)
- B(e);OGATE,P_SPINB(e),XP(H)::QAB1(K),XB(e)
- Q(d);N_GUARD::B(B)
- R(g);S_CUTB(j)::S(A)
- R(h);S_CUTB(j)::S(A)
- R(h);S_CUTB(e)::QAB(K)+P(H)
- R(h);N_GUARD::R1(E),XR(h)
- B(e);N_GUARD,P_PINP(D)::QAB(K)+P(H)
- B(e);N_GUARD::QAB(K)+P(H)
- B(e);S_CUTR(g)::R1(E)
- B(e);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(A),XB(j)
- B(j);S_CUTR(g)::R1(E)
- B(j);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(A)
- Refutation
- R(g);
- Try
- Q(K);XB(j)
- Threat
- S(A)
- Vars
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- R(h);N_GUARD::R1(E),XR(h)
- Refutation
- R(g);XR(E)
- Try
- Q(K);
- Threat
- QAB(K)+P(J)
- Vars
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- R(h);N_GUARD::R1(E),XR(h)
- Refutation
- R(g);XR(E)
- Try
- Actual
- Q(K);
- Vars
- Q(d);CHECK,N_GUARD::B(B),XQ(d)
- Q(d);CHECK,OGATE::P(D),XQ(d)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(l);CHECK,OGATE::R(L)+P(I),XS(l)
- R(g);OGATE,XR(E)::P(D),XR(g)
- B(e);OGATE,P_SPINB(e),XP(H)::QAB1(K),XB(e)
- R(g);S_CUTB(e)::QAB(K)+P(H)
- Q(d);N_GUARD::B(B)
- R(g);S_CUTB(j)::S(A)
- R(h);S_CUTB(j)::S(A)
- R(h);S_CUTB(e)::QAB(K)+P(H)
- R(h);N_GUARD::R1(E),XR(h)
- B(e);N_GUARD,P_PINP(D)::QAB(K)+P(H)
- B(e);N_GUARD::QAB(K)+P(H)
- B(e);S_CUTR(g)::R1(E)
- B(e);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(A),XB(j)
- B(j);S_CUTR(g)::R1(E)
- B(j);S_CUTR(h)::R1(E)
- B(j);N_GUARD::S(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).