MESON Chess Problem Database

Problem Display
PID: 10312 (8/1Q1Rp2B/1qp1K1pr/2P1N3/R1p1k3/7P/b1PP2PB/1r1n3N w - - 0 1)

Reeves, Alfred Christopher

Problem (Zagreb), 1963

8/1Q1Rp2B/1qp1K1pr/2P1N3/R1p1k3/7P/b1PP2PB/1r1n3N

#2

13 + 10

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qxc6#
    • 1...Qa7
      • 2.Qxc6#
    • 1...Qd8
      • 2.Qxc6#
    • 1...Qb2
      • 2.Qxc6#
    • 1...Qb3
      • 2.Qxc6#
    • 1...Qb4
      • 2.Qxc6#
    • 1...Rb3
      • 2.Rxc4#
    • 1...Rxh3
      • 2.Bxg6#
    • 1...Rh4
      • 2.Bxg6#
    • 1...Sb2
      • 2.Sf2#
    • 1...Sf2
      • 2.Sxf2#
    • 1...Sc3
      • 2.Sf2#
    • 1...Se3
      • 2.Sf2#
      • 2.d3#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sg3#
      • 1...Rxh3
        • 2.Bxg6#
      • 1...Qc7!
    • 1.Sf3?
      • threat
        • 2.Sg5#
        • 2.Rd4#
      • 1...Qd8
        • 2.Sg5#
        • 2.Qxc6#
      • 1...Qb2
        • 2.Sg5#
        • 2.Qxc6#
      • 1...Rh5
        • 2.Rd4#
      • 1...Qxc5!
    • 1.Sg4?
      • threat
        • 2.d3#
      • 1...Rxh3
        • 2.Bxg6#
      • 1...Qb3
        • 2.Qxc6#
      • 1...Qb4
        • 2.Qxc6#
      • 1...Rb3
        • 2.Rxc4#
      • 1...Sb2
        • 2.Shf2#
        • 2.Sgf2#
      • 1...Sf2
        • 2.Shxf2#
        • 2.Sgxf2#
      • 1...Rb4!
    • 1.Sxc6?
      • threat
        • 2.Rd4#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Qd8
        • 2.Sb4#
      • 1...Qb2
        • 2.Sb4#
      • 1...Qxc5!
    • 1.Sxg6?
      • threat
        • 2.Sg3#
      • 1...Rxg6+
        • 2.Bxg6#
      • 1...Rxh3
        • 2.Sh4#
      • 1...Qb3
        • 2.Qxc6#
      • 1...Rb3
        • 2.Rxc4#
      • 1...Qc7!
    • 1.Qxb6?
      • threat
        • 2.Qxc6#
      • 1...Sc3
        • 2.Sf2#
      • 1...Se3
        • 2.Sf2#
        • 2.d3#
      • 1...Rxb6!
    • 1.c3?
      • threat
        • 2.Rd4#
      • 1...Sxc3
        • 2.Sf2#
      • 1...Qd8
        • 2.Qxc6#
      • 1...Qxc5!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.d3#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...Rxh3
        • 2.Bxg6#
      • 1...Qb3
        • 2.Qxc6#
      • 1...Rb3
        • 2.Sd6#
      • 1...Sb2
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD::QAB(K),XP(g)
    • Q(f);N_GUARD,N_SPINP(d),P_SPINP(g)::QAB(K),XP(g)
    • R(a);S_CUTB(c)::R(G),XP(d)
    • R(i);N_GUARD,XP(F)::B(M),XP(h)
    • R(i);N_GUARD::B(M),XP(h)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(A)
      • Vars
        • R(i);N_GUARD,XP(F)::B(M),XP(h)
      • Refutation
        • Q(f);
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(i);::R1(L)
      • Refutation
        • Q(f);XP(H)
    • Try
      • S(I);
      • Threat
        • P(C)
      • Vars
        • R(i);N_GUARD,XP(F)::B(M),XP(h)
        • Q(f);N_GUARD::QAB(K),XP(g)
        • Q(f);N_GUARD,N_SPINP(d),P_SPINP(g)::QAB(K),XP(g)
        • R(a);S_CUTB(c)::R(G),XP(d)
      • Refutation
        • R(a);N_SPINP(d),P_SPINP(g)
    • Try
      • S(I);P_SPINS(I),XP(g)
      • Threat
        • R1(L)
      • Vars
        • Q(f);CHECK,OGATE,P_SPINQ(f),XS(I)::QAB(K),XQ(f)
        • Q(f);N_PINS(I)::QAB(K)+S(I)
      • Refutation
        • Q(f);N_PINS(I),XP(H)
    • Try
      • S(I);P_SPINS(I),XP(h)
      • Threat
        • S(A)
      • Vars
        • R(i);CHECK,OGATE,P_SPINR(i),XS(I)::B(M),XR(i)
        • R(i);N_PINS(I),XP(F)::B(M)+S(I)
        • Q(f);N_GUARD::QAB(K),XP(g)
        • R(a);S_CUTB(c)::R(G),XP(d)
      • Refutation
        • Q(f);
    • Try
      • Q(K);XQ(f)
      • Threat
        • QAB(K),XP(g)
      • Vars
        • S(b);N_GUARD::S(A)
      • Refutation
        • R(a);XQ(K)
    • Try
      • P(B);
      • Threat
        • R1(L)
      • Vars
        • S(b);N_GUARD,XP(B)::S(A)
        • Q(f);N_GUARD::QAB(K),XP(g)
      • Refutation
        • Q(f);XP(H)
  • Actual
    • S(I);P_PINP(g),P_SPINS(I),XP(d)
    • Threat
      • P(C)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(I)::R(G),XB(c)
      • R(i);N_GUARD,XP(F)::B(M),XP(h)
      • Q(f);N_GUARD::QAB(K),XP(g)
      • R(a);N_PINS(I)::R(G)+S(I),DCHECK
      • S(b);N_GUARD::S(A)
      • S(b);N_GUARD::S(A),XS(b)
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