MESON Chess Problem Database
Problem Display
PID: 137248 (4r3/1NP1k1P1/1p2n3/1B1PpR2/1q2r2b/5p2/5Q2/4B1RK w - - 0 1)
Wilhelm, Joseph A
Australasian Chess Magazine, 1920
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxe1
- 2.d6#
- 1...Qc3
- 2.d6#
- 1...Qa5
- 2.d6#
- 1...Qb1
- 2.d6#
- 1...Qb2
- 2.d6#
- 1...Qb3
- 2.d6#
- 1...Qa4
- 2.d6#
- 1...Qc4
- 2.d6#
- 1...Sd4
- 2.Bxb4#
- 1...Sf4
- 2.Qxh4#
- 1...Sxg7
- 2.Rxg7#
- 1...Sd8
- 2.c8S#
- 1...Sf8
- 2.g8S#
- 1...Qxe1
- Tries
- 1.Bxb4+?
- 1...Rxb4
- 2.d6#
- 1...Sc5!
- 1...Rxb4
- 1.Qxh4+?
- 1...Sg5
- 2.Qxg5#
- 1...Rxh4+!
- 1...Sg5
- 1.c8Q?
- threat
- 2.Qxe6#
- 2.Qd7#
- 2.Qxe8#
- 1...Qxb5
- 2.Qxe6#
- 2.d6#
- 1...Sxg7
- 2.Rxg7#
- 2.Qd7#
- 2.Qc7#
- 1...Qd6
- 2.Qxe8#
- 1...Rd8
- 2.Qxe6#
- 1...Rf8
- 2.Qxe6#
- 2.Qd7#
- 1...Rg8
- 2.Qxe6#
- 2.Qd7#
- 1...Rh8
- 2.Qxe6#
- 2.Qd7#
- 1...Sd4
- 2.Bxb4#
- 2.Qd7#
- 2.Qc7#
- 2.Qxe8#
- 1...Sf4
- 2.Qxh4#
- 2.Qd7#
- 2.Qc7#
- 2.Qxe8#
- 1...Sc5
- 2.Qxe8#
- 2.d6#
- 1...Sg5
- 2.Qd7#
- 2.Qc7#
- 2.Qxe8#
- 1...Sc7
- 2.Qd7#
- 2.Qxc7#
- 1...Sd8
- 2.Qd7#
- 2.Qc7#
- 1...Sf8
- 2.Qxe8#
- 2.g8S#
- 1...Rxc8!
- threat
- 1.g8Q?
- threat
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 2.Qxe8#
- 1...Qxb5
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 1...Sxc7
- 2.Rg7#
- 2.Rf7#
- 2.Qf7#
- 2.Qh7#
- 2.Qg7#
- 1...Qd6
- 2.Rf7#
- 2.Qf7#
- 2.Qxe8#
- 1...Rf4
- 2.Qxe6#
- 2.Qf7#
- 2.Qxe8#
- 1...Ra8
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 1...Rb8
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 1...Rc8
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 1...Rd8
- 2.Rf7#
- 2.Qxe6#
- 2.Qf7#
- 1...Rf8
- 2.Qxe6#
- 1...Bf6
- 2.Qxe8#
- 1...Sd4
- 2.Bxb4#
- 2.Rg7#
- 2.Rf7#
- 2.Qf7#
- 2.Qh7#
- 2.Qg7#
- 2.Qxe8#
- 1...Sf4
- 2.Rg7#
- 2.Rf7#
- 2.Qxh4#
- 2.Qf7#
- 2.Qh7#
- 2.Qg7#
- 2.Qxe8#
- 1...Sc5
- 2.Rg7#
- 2.Rf7#
- 2.Qf7#
- 2.Qh7#
- 2.Qg7#
- 2.Qxe8#
- 2.d6#
- 1...Sg5
- 2.Qxe8#
- 1...Sg7
- 2.Rxg7#
- 2.Rf7#
- 2.Qf7#
- 2.Qxg7#
- 1...Sd8
- 2.Qxe8#
- 2.c8S#
- 1...Sf8
- 2.Rg7#
- 2.Rf7#
- 2.Qf7#
- 2.Qg7#
- 1...Rxg8!
- threat
- 1.Bxb4+?
- Keys
- 1.Qxb6!
- threat
- 2.Qxe6#
- 1...Sxc7
- 2.Qxc7#
- 1...Sxg7
- 2.Rxg7#
- 1...Qd6
- 2.Qxd6#
- 1...Sd4
- 2.Bxb4#
- 1...Sf4
- 2.Bxh4#
- 1...Sc5
- 2.Qd6#
- 1...Sg5
- 2.Qf6#
- 1...Sd8
- 2.c8S#
- 1...Sf8
- 2.g8S#
- threat
- 1.Qxb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD,P_PINR(B),XB(A)::P(F)
- Q(b);N_GUARD::P(F)
- S(g);N_GUARD,S_CUTR(c)::B(A),XQ(b)
- S(g);N_GUARD,S_CUTR(c)::QAB(D),XB(d)
- S(g);OGATE,XP(J)::R(B),XS(g)
- S(g);S_CUTR(i)::P=S
- Tries
- Try
- B(A);CHECK,XQ(b)
- Vars
- R(c);XB(A)::P(F)
- Refutation
- S(g);P_SPINS(g)
- Try
- Q(D);CHECK,XB(d)
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAB(D),XS(g)
- Refutation
- R(c);CHECK,XQ(D)
- Try
- P(I);
- Threat
- DUALS(3)
- Vars
- Q(b);::QAR1(I),XR(i)
- R(i);::QAR1(I),XS(g)
- Refutation
- R(i);XQ(I)
- Try
- P(J);
- Threat
- DUALS(4)
- Vars
- R(i);::QAR1(J),XS(g)
- B(d);::QAR1(J),XR(i)
- S(g);::QAR1(J),XR(i)
- Refutation
- R(i);XQ(J)
- Try
- Actual
- Q(D);XP(f)
- Threat
- QAR1(D),XS(g)
- Vars
- S(g);OGATE,XP(I)::QAR2(D),XS(g)
- S(g);OGATE,XP(J)::R(B),XS(g)
- Q(b);N_GUARD::QAB1(D),XQ(b)
- S(g);N_GUARD,S_CUTR(c)::B(A),XQ(b)
- S(g);N_GUARD,S_CUTR(c)::B(A),XB(d)
- S(g);S_CUTQ(b)::QAB1(D)
- S(g);OGATE::QAB1(D)
- S(g);S_CUTR(i)::P=S
Developed and maintained by Brian Stephenson.
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