MESON Chess Problem Database

Problem Display
PID: 6963 (Nrkb4/1q1R2QK/B6n/8/8/2r5/8/8 w - - 0 1)

Howard, Kenneth Samuel

The Chess Review, 1935

Nrkb4/1q1R2QK/B6n/8/8/2r5/8/8

#2

5 + 6

5088 How to Solve Chess Problems 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sb6#
    • 1...Bh4
      • 2.Sb6#
    • 1...Bg5
      • 2.Sb6#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bf6
      • 2.Sb6#
    • 1...Be7
      • 2.Sb6#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Qd7#
      • 1...Rxa8
        • 2.Qxb7#
      • 1...Rc7
        • 2.Sb6#
      • 1...Sf7
        • 2.Qg4#
      • 1...Be7!
    • 1.Rd5?
      • threat
        • 2.Qd7#
      • 1...Rxa8
        • 2.Qxb7#
      • 1...Rc7
        • 2.Sb6#
      • 1...Sf7
        • 2.Qg4#
      • 1...Be7!
    • 1.Rc7+?
      • 1...Rxc7
        • 2.Sb6#
      • 1...Bxc7!
    • 1.Qxc3+?
      • 1...Bc7
        • 2.Sb6#
        • 2.Qxc7#
      • 1...Kxd7!
    • 1.Qf8?
      • threat
        • 2.Sb6#
        • 2.Qxd8#
      • 1...Qxa6
        • 2.Qxd8#
      • 1...Rxa8
        • 2.Qxd8#
      • 1...Rb3
        • 2.Rc7#
        • 2.Qxd8#
      • 1...Rc6
        • 2.Qxd8#
      • 1...Sf7
        • 2.Sb6#
      • 1...Kxd7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qd7#
      • 1...Rxa8
        • 2.Qxb7#
      • 1...Be7
        • 2.Qxc3#
      • 1...Rc7
        • 2.Sb6#
      • 1...Sf7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);S_CUTB(f)::S(E)
    • B(f);N_GUARD::S(E)
    • B(f);N_GUARD::S(E),XB(f)
  • Tries
    • Try
      • R(B);P_SPINQ(C)
      • Threat
        • QAB1(C)
      • Vars
        • R(d);N_GUARD,XS(E)::QAB1(C),XQ(c)
        • R(a);S_CUTB(f)::S(E)
        • S(b);N_PINQ(C)::QAB(C)
      • Refutation
        • B(f);N_PINQ(C)
    • Try
      • R(B);P_SPINQ(C)
      • Threat
        • QAB1(C)
      • Vars
        • R(d);N_GUARD,XS(E)::QAB1(C),XQ(c)
        • R(a);S_CUTB(f)::S(E)
        • S(b);N_PINQ(C)::QAB(C)
      • Refutation
        • B(f);N_PINQ(C)
    • Try
      • R(B);CHECK
      • Vars
        • R(a);P_PINQ(C),XR(B)::S(E)
      • Refutation
        • B(f);XR(B)
    • Try
      • Q(C);CHECK,P_SPINR(B),XR(a)
      • Refutation
        • K(e);N_SPINQ(c),S_FLIGHT,XR(B)
    • Try
      • Q(C);P_PINB(f),P_SPINR(B)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_PINR(B),N_SPINQ(c),XB(A)::QAR1(C),XB(f)
        • R(d);XS(E)::QAR1(C),XB(f)
        • R(a);::QAR1(C),XB(f)
        • S(b);N_PINR(B)::S(E)
      • Refutation
        • K(e);N_SPINB(f),N_SPINQ(c),S_FLIGHT,XR(B)
  • Actual
    • R(B);P_SPINQ(C)
    • Threat
      • QAB1(C)
    • Vars
      • R(d);N_GUARD,XS(E)::QAB1(C),XQ(c)
      • B(f);N_PINQ(C)::QAR(C),XR(a)
      • R(a);S_CUTB(f)::S(E)
      • S(b);N_PINQ(C)::QAB(C)
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