MESON Chess Problem Database
Problem Display
PID: 54031 (6nn/3b2B1/1K1N1r2/2PB2R1/3k1P2/6Rp/1Nprp3/Qq6 w - - 0 1)
Ulehla, Johann Viktor
Schach-Echo, 1933
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Qg1#
- 1...Qd1
- 2.Sxd1#
- 1...Qe1
- 2.Sd1#
- 1...Qf1
- 2.Sd1#
- 1...Qg1
- 2.Sd1#
- 2.Qxg1#
- 1...Qh1
- 2.Sd1#
- 1...Qxb2+
- 2.Qxb2#
- 1...Rd3
- 2.Rxd3#
- 1...Ba4
- 2.Qxa4#
- 1...Bg4
- 2.Qa4#
- 1...Be6
- 2.Sb5#
- 2.Qa4#
- 1...Bc8
- 2.Qa4#
- 1...Sh6
- 2.Bxf6#
- 1...Se7
- 2.Bxf6#
- 1...Qa2
- Tries
- 1.Bg2?
- threat
- 2.Rd5#
- 1...Qxb2+
- 2.Qxb2#
- 1...Rd3
- 2.Rxd3#
- 1...Qa2
- 2.Qg1#
- 1...Bf5
- 2.Qa4#
- 1...Bc6
- 2.Sf5#
- 1...Be6
- 2.Sb5#
- 1...Se7
- 2.Bxf6#
- 1...hxg2!
- threat
- 1.Bc6?
- threat
- 2.Sb5#
- 2.Rd5#
- 2.Qa4#
- 1...Qxb2+
- 2.Qxb2#
- 1...Qxa1
- 2.Sb5#
- 2.Rd5#
- 1...Rd3
- 2.Sb5#
- 2.Rxd3#
- 1...c1Q
- 2.Sb5#
- 2.Rd5#
- 1...c1R
- 2.Sb5#
- 2.Rd5#
- 1...Qa2
- 2.Sb5#
- 2.Qg1#
- 1...Qh1
- 2.Sd1#
- 2.Sb5#
- 2.Qa4#
- 1...Bf5
- 2.Sb5#
- 2.Sxf5#
- 2.Qa4#
- 1...Be6
- 2.Sb5#
- 1...Se7
- 2.Sb5#
- 2.Bxf6#
- 2.Qa4#
- 1...Bxc6!
- threat
- 1.Bb7?
- threat
- 2.Rd5#
- 1...Qxb2+
- 2.Qxb2#
- 1...Rd3
- 2.Rxd3#
- 1...Qa2
- 2.Qg1#
- 1...Qh1
- 2.Sd1#
- 1...Bf5
- 2.Qa4#
- 1...Be6
- 2.Sb5#
- 1...Se7
- 2.Bxf6#
- 1...Bc6!
- threat
- 1.Ba8?
- threat
- 2.Rd5#
- 1...Qxb2+
- 2.Qxb2#
- 1...Rd3
- 2.Rxd3#
- 1...Qa2
- 2.Qg1#
- 1...Qh1
- 2.Sd1#
- 1...Bf5
- 2.Qa4#
- 1...Be6
- 2.Sb5#
- 1...Se7
- 2.Bxf6#
- 1...Bc6!
- threat
- 1.Bxg8?
- threat
- 2.Bxf6#
- 2.Rd5#
- 1...Qxb2+
- 2.Qxb2#
- 1...Rd3
- 2.Bxf6#
- 2.Rxd3#
- 1...e1Q
- 2.Rd5#
- 1...e1R
- 2.Rd5#
- 1...Bc6
- 2.Bxf6#
- 1...Qa2
- 2.Bxf6#
- 2.Qg1#
- 1...Qh1
- 2.Sd1#
- 2.Bxf6#
- 1...Bf5
- 2.Bxf6#
- 2.Qa4#
- 1...Be6
- 2.Bxf6#
- 1...Sg6
- 2.Rd5#
- 1...Sf7!
- threat
- 1.Qa3?
- threat
- 2.Qb4#
- 2.Qc3#
- 2.Qe3#
- 1...Qxb2+
- 2.Qxb2#
- 1...c1Q
- 2.Qe3#
- 1...c1R
- 2.Qe3#
- 1...e1Q
- 2.Qb4#
- 2.Qc3#
- 1...e1R
- 2.Qb4#
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 2.Qe3#
- 1...Qg1
- 2.Qb4#
- 2.Qc3#
- 1...Rd3
- 2.Rxd3#
- 2.Qb4#
- 2.Qxd3#
- 1...Bb5
- 2.Qc3#
- 2.Qe3#
- 1...Bf5!
- threat
- 1.Bg2?
- Keys
- 1.Bh1!
- threat
- 2.Rd5#
- 1...Qxb2+
- 2.Qxb2#
- 1...Qxh1
- 2.Sd1#
- 1...Rd3
- 2.Rxd3#
- 1...Qa2
- 2.Qg1#
- 1...Bf5
- 2.Qa4#
- 1...Bc6
- 2.Sf5#
- 1...Be6
- 2.Sb5#
- 1...Se7
- 2.Bxf6#
- threat
- 1.Bh1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(a);N_PINS(B),OGATE,P_PINS(I)::QAB(A)
- Q(a);N_PINS(B),P_PINS(I)::QAB(A)+S(B),XQ(a)
- Q(a);N_PINS(B),P_PINS(I)::QAB(A)+S(B)
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- R(c);N_GUARD::R1(C),XR(c)
- B(h);N_GUARD::QAR(A),XB(h)
- B(h);N_GUARD::QAR(A)
- S(i);N_GUARD::B(J),XR(g)
- Tries
- Try
- B(F);
- Threat
- R1(G)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- R(c);N_GUARD::R1(C),XR(c)
- Q(a);N_PINS(B),OGATE,P_PINS(I)::QAB(A)
- B(h);N_GUARD::QAR(A)
- B(h);::S(I)
- S(i);N_GUARD::B(J),XR(g)
- Refutation
- P(e);XB(F)
- Try
- B(F);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- B(h);::S(I)
- Refutation
- B(h);XB(F)
- Try
- B(F);
- Threat
- R1(G)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- R(c);N_GUARD::R1(C),XR(c)
- Q(a);N_PINS(B),OGATE,P_PINS(I)::QAB(A)
- Q(a);N_PINS(B),P_PINS(I)::QAB(A)+S(B)
- B(h);N_GUARD::QAR(A)
- B(h);::S(I)
- S(i);N_GUARD::B(J),XR(g)
- Refutation
- B(h);
- Try
- B(F);
- Threat
- R1(G)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- R(c);N_GUARD::R1(C),XR(c)
- Q(a);N_PINS(B),OGATE,P_PINS(I)::QAB(A)
- Q(a);N_PINS(B),P_PINS(I)::QAB(A)+S(B)
- B(h);N_GUARD::QAR(A)
- B(h);::S(I)
- S(i);N_GUARD::B(J),XR(g)
- Refutation
- B(h);
- Try
- B(F);XS(i)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- P(d);::R1(G)
- B(h);::B(J),XR(g)
- S(j);::R1(G)
- Refutation
- S(j);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),XS(B)::QAB(A),XQ(a)
- P(b);::QAB1(A)
- Refutation
- B(h);
- Try
- Actual
- B(F);
- Threat
- R1(G)
- Vars
- Q(a);CHECK,OGATE,P_PINS(I),P_SPINQ(a),XS(B)::QAB(A),XQ(a)
- Q(a);N_PINS(B),P_PINS(I),XB(F)::QAB(A)+S(B)
- R(c);N_GUARD::R1(C),XR(c)
- Q(a);N_PINS(B),OGATE,P_PINS(I)::QAB(A)
- B(h);N_GUARD::QAR(A)
- B(h);::S(I)
- S(i);N_GUARD::B(J),XR(g)
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).