MESON Chess Problem Database

Problem Display
PID: 17048 (8/NpKn1p2/p2Q2p1/k3nR2/4pNp1/2Rp1b2/r1r2p1q/3BB3 w - - 0 1)

Deiss, Edward L

To Alain White, 1945

8/NpKn1p2/p2Q2p1/k3nR2/4pNp1/2Rp1b2/r1r2p1q/3BB3

#2

8 + 15

3207 A R Gooderson An English Progressive 1996
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rab2
      • 2.Qa3#
    • 1...Ra3
      • 2.Qxa3#
    • 1...Ra4
      • 2.Rc5#
    • 1...Rc1
      • 2.Rc5#
    • 1...Rcb2
      • 2.Ra3#
      • 2.Rc5#
    • 1...Re2
      • 2.Ra3#
      • 2.Rc5#
    • 1...Rxc3+
      • 2.Bxc3#
    • 1...Sc5
      • 2.Ra3#
  • Tries
    • 1.Sxd3?
      • threat
        • 2.Qb4#
      • 1...Rxc3+
        • 2.Bxc3#
      • 1...Ka4
        • 2.Qb4#
      • 1...Rab2
        • 2.Qa3#
      • 1...Ra4
        • 2.Rc5#
      • 1...Rcb2
        • 2.Ra3#
        • 2.Rc5#
      • 1...Sc5
        • 2.Ra3#
      • 1...exd3!
    • 1.Sc6+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kb5
        • 2.Qb4#
      • 1...bxc6!
    • 1.Qc5+?
      • 1...Sxc5
        • 2.Ra3#
      • 1...b5
        • 2.Ra3#
      • 1...Ka4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qb4#
      • 1...Rxc3+
        • 2.Bxc3#
      • 1...Ka4
        • 2.Qb4#
      • 1...Rab2
        • 2.Qa3#
      • 1...Ra4
        • 2.Rc5#
      • 1...Rcb2
        • 2.Ra3#
        • 2.Rc5#
      • 1...Sc4
        • 2.Ra3#
      • 1...Sc6
        • 2.Ra3#
      • 1...Sc5
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::QAR2(F)
    • R(a);N_GUARD::QAR2(F),XR(a)
    • R(a);SBLOCK::B(B)+R(C),DCHECK
    • R(b);::B(B)+R(C),DCHECK
    • R(b);CHECK,OGATE,P_SPINR(b),XR(C)::B(B),XR(b)
    • S(n);N_PINR(C),N_SPINS(j)::B(B)+R(C),DCHECK
  • Tries
    • Try
      • S(D);XP(e)
      • Threat
        • QAB1(F)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XR(C)::B(B),XR(b)
        • K(i);N_SPINS(j),P-FLIGHT,P_SPINR(b)::QAR1(F)
        • R(a);N_GUARD::QAR2(F)
        • R(a);SBLOCK::B(B)+R(C),DCHECK
        • S(n);N_PINR(C),N_SPINS(j)::B(B)+R(C),DCHECK
      • Refutation
        • P(g);XS(D)
    • Try
      • S(G);CHECK,N_SPINR(C)
      • Vars
        • K(i);N_SPINS(j),P-FLIGHT,P_SPINR(b)::QAR1(F)
        • K(i);P-FLIGHT::QAR1(F)
      • Refutation
        • P(m);XS(G)
    • Try
      • Q(F);CHECK,N_PINS(j),N_SPINR(C)
      • Vars
        • S(n);XQ(F)::B(B)+R(C),DCHECK
        • P(m);P_SPINP(m)::B(B)+R(C),DCHECK
      • Refutation
        • K(i);P-FLIGHT,P_SPINR(b)
  • Actual
    • S(D);N_PINS(j)
    • Threat
      • QAB1(F)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XR(C)::B(B),XR(b)
      • K(i);P-FLIGHT,P_SPINR(b)::QAR1(F)
      • R(a);N_GUARD::QAR2(F)
      • R(a);SBLOCK::B(B)+R(C),DCHECK
      • S(j);N_PINR(C),P_PINQ(F)::B(B)+R(C),DCHECK
      • S(n);N_PINR(C)::B(B)+R(C),DCHECK
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