MESON Chess Problem Database

Problem Display
PID: 17809 (K1R5/8/pp1NN3/5Q1r/1p2p2r/1P1k2p1/pR1b2B1/3b2B1 w - - 0 1)

Mansfield, Comins

2nd Prize, American Chess Bulletin, 1951

K1R5/8/pp1NN3/5Q1r/1p2p2r/1P1k2p1/pR1b2B1/3b2B1

#2

9 + 11

3105 FIDE Album (1945-1955) 1964
3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qf1#
    • 1...Rh1
      • 2.Qxe4#
    • 1...Rh2
      • 2.Qxe4#
    • 1...Rh3
      • 2.Qxe4#
    • 1...Bc2
      • 2.Bf1#
      • 2.Qf1#
    • 1...Bxb3
      • 2.Bf1#
      • 2.Qf1#
    • 1...Bg4
      • 2.Qxe4#
    • 1...Bf4
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Bg5
      • 2.Qd5#
  • Tries
    • 1.Sf4+?
      • 1...Bxf4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Rxf4!
    • 1.Bxe4+?
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Ke2!
    • 1.Qd5+?
      • 1...Ke2
        • 2.Qxd2#
      • 1...Rxd5!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Rxd2#
      • 1...Ke2
        • 2.Qf1#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Bc2
        • 2.Bf1#
        • 2.Qf1#
      • 1...Bc1
        • 2.Rd8#
      • 1...Be1
        • 2.Rd8#
      • 1...Bc3
        • 2.S4c5#
      • 1...Be3
        • 2.Sf2#
      • 1...Bf4
        • 2.S4g5#
      • 1...Bg5
        • 2.Qd5#
      • 1...Bh6
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • K(d);N_SPINP(g),P_SPINB(c),S_FLIGHT::QAB1(E)
    • R(h);N_GUARD::QAB1(E),XP(g)
    • B(a);S_CUTR(h)::QAB1(E),XP(g)
    • B(c);S_CUTR(i)::QAR2(E)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • R(h);XS(G)
    • Try
      • B(C);CHECK,XP(g)
      • Vars
        • R(h);OGATE,P_SPINR(h),XB(C)::QAB1(E),XR(h)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(g)
      • Vars
        • K(d);OGATE,P_SPINB(c),S_FLIGHT::QAR1(E),XB(c)
      • Refutation
        • R(i);XQ(E)
  • Actual
    • S(F);XP(g)
    • Threat
      • R1(B),XB(c)
    • Vars
      • K(d);P_SPINB(c),S_FLIGHT::QAB1(E)
      • R(h);OGATE,P_SPINR(h),XS(F)::QAB1(E),XR(h)
      • B(c);::R(I)
      • B(c);SBLOCK::QAB(E)+S(F),DCHECK
      • B(c);S_CUTR(h)::QAB(E)+S(F)
      • B(c);S_CUTR(i)::QAR2(E)
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